Select the most appropriate option to fill in the blank.
Living within our environmental limits is one of the central _________________ of sustainable development.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. principles.
Context: The sentence talks about a key concept of sustainable development. Living within environmental limits is being described as a core idea of sustainability.
Analysis of the given options:
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principles: Basic truths or rules guiding behaviour.
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agencies: Organisations or entities.
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demonstrates: Shows or proves something.
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illuminates: Lights up or explains something.
Correct word: Principles
Reason: It means fundamental truths or guiding rules. Sustainable development is based on guiding principles, so this fits logically.
Final sentence: Living within our environmental limits is one of the central principles of sustainable development.
Hence, the chosen option is correct.