Meaning: 'Issues' refers to important problems or topics that need to be addressed.

Wrong options:

• range: The word 'range' is a noun that refers to a variety or extent of something, which does not fit the context of environmental problems.
• generations: The word 'generations' is a plural noun referring to groups of people born around the same time, which does not relate to environmental concerns directly.
• attain: The word 'attain' is a verb meaning to achieve or reach something, which does not fit grammatically in this context as a noun is required.
• Renewable: The word 'Renewable' is an adjective that describes energy sources but does not fit as a noun in this context.
• human: The word 'human' is an adjective that describes something related to people, which does not fit as a noun for environmental problems.
• extreme: The word 'extreme' is an adjective that describes something very severe or intense, which does not fit as a noun in this context.

Correct answer: human

Explanation: The term 'human' serves as an adjective that describes the type of activity being discussed. It fits grammatically and contextually as it specifies the activities that impact the environment.

Meaning: 'Human' refers to anything related to people or mankind.

Wrong options:

• issues: The word 'issues' is a plural noun that does not fit as it does not describe the type of activity.
• range: The word 'range' is a noun that refers to a variety or extent, which does not fit the context of describing activity.
• attain: The word 'attain' is a verb meaning to achieve something, which does not fit grammatically as an adjective is needed.
• Renewable: The word 'Renewable' is an adjective that describes energy sources, but it does not fit as it does not describe activity.
• extreme: The word 'extreme' is an adjective that describes severity, which does not fit as it does not describe the type of activity.
• generations: The word 'generations' is a plural noun referring to groups of people, which does not fit as it does not describe activity.

Correct answer: Renewable

Explanation: The word 'Renewable' is an adjective that describes energy sources that can be replenished. It fits grammatically and contextually as it specifies the type of energy being discussed in relation to environmental strategies.

Meaning: 'Renewable' refers to energy sources that are sustainable and can be replenished naturally, such as solar or wind energy.

Wrong options:

• issues: The word 'issues' is a plural noun that does not fit as it does not describe a type of energy.
• range: The word 'range' is a noun that refers to a variety or extent, which does not fit in the context of describing energy.
• human: The word 'human' is an adjective that describes people, which does not fit as it does not describe energy.
• extreme: The word 'extreme' is an adjective that describes severity, which does not fit as it does not describe energy.
• attain: The word 'attain' is a verb meaning to achieve something, which does not fit grammatically as an adjective is needed.
• generations: The word 'generations' is a plural noun referring to groups of people, which does not fit as it does not describe energy.

Correct answer: generations

Explanation: The word 'generations' is a plural noun that refers to groups of people born around the same time. It fits grammatically and contextually as it indicates the future people who will benefit from sustainable practices.

Meaning: 'Generations' refers to all the people born and living at about the same time, often considered as a group.

Wrong options:

• issues: The word 'issues' is a plural noun that does not fit as it does not refer to people or groups.
• range: The word 'range' is a noun that refers to a variety or extent, which does not fit in the context of referring to people.
• attain: The word 'attain' is a verb meaning to achieve something, which does not fit grammatically as a noun is needed.
• Renewable: The word 'Renewable' is an adjective that describes energy sources, which does not fit as it does not refer to people.
• human: The word 'human' is an adjective that describes something related to people, but it does not fit as a noun for future groups.
• extreme: The word 'extreme' is an adjective that describes severity, which does not fit as it does not refer to people.