A.I. Explanation:

Correct answer: principles

Explanation: The word 'principles' fits grammatically as a noun that refers to fundamental truths or propositions that serve as the foundation for a system of belief or behavior. In this context, it aligns with the concept of sustainability, indicating the foundational ideas that guide sustainable transportation practices.

Meaning: 'Principles' means the basic rules or beliefs that guide actions and decisions.

Wrong options:

• restrictions: 'Restrictions' implies limitations or constraints, which does not fit the context of guiding ideas for sustainability.
• plains: 'Plains' refers to flat lands and is unrelated to the context of transportation or sustainability principles.
• activation: 'Activation' suggests the process of making something active, which does not align with the foundational concept needed here.

Correct answer: sustainability

Explanation: The term 'sustainability' is a noun that refers to the ability to be maintained at a certain rate or level, particularly in the context of environmental practices. It fits contextually as it directly relates to the principles being applied to transportation, emphasizing the need for environmentally friendly practices.

Meaning: 'Sustainability' means the capacity to endure or maintain ecological balance without depleting resources.

Wrong options:

• relaxed: 'Relaxed' implies a state of ease or lack of tension, which does not relate to the concept of sustainable practices.
• substance: 'Substance' refers to the physical matter or essence of something, which is not relevant in this context.
• reliability: 'Reliability' refers to the quality of being trustworthy or consistent, which does not directly connect to the principles of sustainability.

Correct answer: reduced

Explanation: The word 'reduced' is the past participle of 'reduce,' which fits grammatically as it indicates a decrease in costs. Contextually, it aligns with the overall theme of sustainability, suggesting that costs will be lowered as a result of sustainable practices.

Meaning: 'Reduced' means made smaller or less in amount, degree, or size.

Wrong options:

• cut: 'Cut' implies a direct action to lower costs, but it does not fit grammatically as well as 'reduced' in this context.
• enhanced: 'Enhanced' means improved or increased, which contradicts the idea of lowering costs.
• leased: 'Leased' refers to renting something, which does not relate to the context of reducing costs.

Correct answer: within

Explanation: The word 'within' is a preposition that indicates being inside or enclosed by something. It fits grammatically and contextually, as it describes trips occurring inside the city limits, which is relevant to the discussion of public transit.

Meaning: 'Within' means inside the limits or boundaries of something.

Wrong options:

• with: 'With' is a preposition that indicates accompaniment, which does not fit the context of location within the city.
• added: 'Added' is an adjective that implies something extra, which does not make sense in this context.
• included: 'Included' suggests being part of a whole, but it does not convey the specific location aspect needed here.

Correct answer: prosper

Explanation: The verb 'prosper' fits grammatically as it indicates thriving or succeeding, which aligns with the context of businesses benefiting from increased foot traffic. It conveys a positive outcome resulting from the sustainable environment.

Meaning: 'Prosper' means to be successful or to thrive, especially in financial terms.

Wrong options:

• enlarge: 'Enlarge' means to make bigger, which does not fit the context of businesses benefiting from foot traffic.
• prepare: 'Prepare' means to make ready, which does not relate to the outcome of thriving businesses in this context.
• repair: 'Repair' means to fix something, which is unrelated to the idea of businesses succeeding.

Correct answer: volume

Explanation: The noun 'volume' fits grammatically as it refers to the amount of space occupied by something, which in this case relates to the amount of foot traffic. It is contextually appropriate as it emphasizes the large quantity of pedestrians benefiting the businesses.

Meaning: 'Volume' means the amount or quantity of something, particularly in terms of space or capacity.

Wrong options:

• amounts: 'Amounts' is a plural noun that refers to quantities but does not convey the same sense of space as 'volume.'
• range: 'Range' implies a variety or extent, which does not specifically relate to the quantity of foot traffic.
• time: 'Time' refers to a measurable period, which is irrelevant in the context of foot traffic.

Correct answer: longer

Explanation: The word 'longer' is a comparative adjective that indicates an extended duration or distance. It fits grammatically and contextually, as it suggests that land for parking is no longer necessary, aligning with the sustainable transportation theme.

Meaning: 'Longer' means for a greater length of time or distance, indicating that parking land is not needed anymore.

Wrong options:

• time: 'Time' is a noun that refers to a measurable period, which does not fit the context of land requirements.
• how: 'How' is an adverb that asks about the manner or way of doing something, which is irrelevant here.
• greater: 'Greater' is a comparative adjective that indicates a larger amount or degree, but it does not fit the context of land requirements as effectively as 'longer.'