Meaning: A 'nugget' in this context means a small but valuable piece of wisdom or insight.

Wrong options:

• repository: 'Repository' refers to a place where things are stored, which does not fit the context of conveying wisdom.
• pile: 'Pile' suggests a heap or collection of items, lacking the connotation of value or wisdom needed here.
• lumber: 'Lumber' refers to wood that has been processed for use, which is unrelated to the concept of wisdom.

Correct answer: inspirational

Explanation: The term 'inspirational' is appropriate here as it describes something that motivates or uplifts, which aligns with the context of the quote being turned into a meme that encourages positivity about aging. It fits grammatically and contextually as it describes the nature of the memes created from the quote.

Meaning: 'Inspirational' means something that provides motivation or encouragement, often uplifting in nature.

Wrong options:

• invalid: 'Invalid' means not valid or acceptable, which contradicts the positive nature of the memes derived from the quote.
• unconventional: 'Unconventional' suggests something that is not traditional or expected, which does not capture the uplifting essence of the memes.
• instrumental: 'Instrumental' implies serving as a means to an end, which does not accurately describe the motivational aspect of the memes.

Correct answer: longevity

Explanation: The word 'longevity' fits perfectly as it refers to a long duration of life, which is relevant to the context of how subjective age impacts health and lifespan. It aligns grammatically and contextually with the discussion about age and its effects on living longer.

Meaning: 'Longevity' means a long life or the duration of life, particularly in the context of health and aging.

Wrong options:

• subjectivity: 'Subjectivity' refers to personal perspectives or opinions, which does not relate to the concept of living longer.
• sensitivity: 'Sensitivity' implies a responsiveness to external factors, which is not relevant to the discussion of lifespan.
• objectivity: 'Objectivity' refers to the quality of being unbiased or impartial, which does not fit the context of discussing age and health.

Correct answer: address

Explanation: The word 'address' is suitable here as it means to deal with or discuss a particular issue, which fits the context of exploring the complexities of subjective age scientifically. It aligns grammatically and contextually with the idea of tackling a challenging question.

Meaning: 'Address' means to deal with or discuss a particular issue or problem.

Wrong options:

• test: 'Test' implies conducting an experiment or examination, which does not capture the broader context of discussing the issue.
• produce: 'Produce' means to create or generate, which does not fit the context of discussing or dealing with a question.
• measure: 'Measure' refers to quantifying something, which is not the same as addressing or discussing the complexities involved.