A.I. Explanation:

Correct answer: worth

Explanation: The word 'worth' fits grammatically as it refers to the value of something in monetary terms, aligning with the context of discussing income. It indicates the economic value produced per dollar, which is the focus of the sentence.

Meaning: 'Worth' refers to the value or importance of something, especially in terms of money or resources.

Wrong options:

• plenty: 'Plenty' refers to a large amount or abundance, which does not fit the context of measuring economic output.
• money: 'Money' is a general term for currency and does not specifically convey the concept of value in this context.
• value: 'Value' is a synonym for worth but does not fit grammatically as it would require a different structure in the sentence.

Correct answer: relative

Explanation: The term 'relative' is appropriate as it describes the shares of fossil-based and fossil-free sources in comparison to each other, fitting the context of discussing proportions in the energy mix.

Meaning: 'Relative' means considered in relation or in proportion to something else, which is relevant when discussing shares of energy sources.

Wrong options:

• relevant: 'Relevant' means closely connected or appropriate, but it does not fit the context of shares which are being compared.
• similar: 'Similar' implies likeness but does not convey the idea of proportion or comparison needed here.
• communal: 'Communal' refers to something shared by a community, which does not relate to the context of energy shares.

Correct answer: address

Explanation: The verb 'address' is suitable as it means to deal with or discuss a particular issue, which is the intent when referring to climate change in this context.

Meaning: 'Address' means to speak about or deal with a problem or issue, particularly in a formal context.

Wrong options:

• outline: 'Outline' means to give a brief summary or overview, which does not convey the action of tackling an issue like climate change.
• point: 'Point' can mean to indicate or direct attention to something, but it lacks the nuance of actively dealing with a problem.
• highlight: 'Highlight' means to emphasize or make something stand out, which does not imply the action of resolving or addressing an issue.

Correct answer: nonetheless

Explanation: The word 'nonetheless' serves as a discourse marker indicating contrast, fitting well in the context of presenting a surprising fact despite previous statements about economic growth.

Meaning: 'Nonetheless' means in spite of that; nevertheless, indicating that the following statement is surprising or contrary to expectations.

Wrong options:

• thus: 'Thus' indicates a conclusion or result, which does not fit the context of presenting a contrasting idea.
• thereby: 'Thereby' means as a result of that, which does not convey the contrast intended in this context.
• also: 'Also' indicates addition, which does not align with the contrasting nature of the statement.

Correct answer: with

Explanation: The preposition 'with' is appropriate as it indicates the relationship between economic growth and finite resources, fitting grammatically and contextually in the sentence.

Meaning: 'With' indicates association or connection, which is necessary to express the relationship between economic growth and resources.

Wrong options:

• over: 'Over' implies a position above something, which does not fit the context of discussing compatibility.
• within: 'Within' suggests being inside or contained by something, which does not accurately convey the relationship intended here.
• by: 'By' indicates the means of achieving something, which does not fit the context of discussing compatibility.