A.I. Explanation:

Correct answer: accounted

Explanation: The word 'accounted' fits grammatically as it is the past tense of the verb, aligning with the context of the sentence which discusses a statistic from 2015. It indicates the proportion of electricity usage, making it contextually appropriate as it conveys the idea of representing a part of a whole.

Meaning: 'Accounted' means to represent or constitute a certain amount or percentage of something, in this case, the electricity usage by households.

Wrong options:

• represented: While 'represented' could fit, it implies a more abstract notion of depiction rather than the specific quantifiable aspect of electricity usage.
• identified: 'Identified' suggests recognition or naming, which does not convey the statistical relationship needed in this context.
• equaled: 'Equaled' implies a direct equivalence, which does not accurately reflect the idea of a percentage of total electricity usage.

Correct answer: expected

Explanation: The word 'expected' is appropriate as it indicates a prediction or anticipation regarding future energy use due to climate change. It fits grammatically and contextually, suggesting that increased temperatures will lead to higher energy consumption.

Meaning: 'Expected' means to anticipate or look forward to something happening, in this case, increased energy use.

Wrong options:

• subjected: 'Subjected' implies being exposed to something unpleasant, which does not fit the context of predicting energy use.
• retrospected: 'Retrospected' refers to looking back at past events, which is irrelevant in the context of future expectations.
• suspected: 'Suspected' implies doubt or uncertainty, which does not align with the confident prediction of increased energy use.

Correct answer: lead

Explanation: The word 'lead' fits grammatically and contextually as it indicates a causal relationship, suggesting that increased air conditioning use will result in more greenhouse gas emissions. It is the correct verb form to convey this outcome.

Meaning: 'Lead' means to cause or result in something, in this case, more emissions due to increased energy consumption.

Wrong options:

• refer: 'Refer' means to mention or allude to something, which does not convey the cause-and-effect relationship needed here.
• return: 'Return' implies going back to a previous state, which does not fit the context of increasing emissions.
• require: 'Require' suggests a necessity but does not imply the direct causation that 'lead' does.

Correct answer: generated

Explanation: The word 'generated' is the correct choice as it refers to the production of electricity, fitting grammatically in the passive voice structure of the sentence. It aligns with the context of meeting increased energy demand.

Meaning: 'Generated' means to produce or create, particularly in the context of electricity production.

Wrong options:

• correlated: 'Correlated' implies a relationship between two variables but does not fit the context of producing electricity.
• separated: 'Separated' suggests dividing or isolating, which does not apply to the context of electricity production.
• integrated: 'Integrated' means to combine or incorporate, which does not accurately describe the process of producing electricity to meet demand.