Final answer:
The cognitive reserve hypothesis suggests that a larger brain size provides protection against injury, disease, and promotes longevity.
Step-by-step explanation:
The cognitive reserve hypothesis suggests that the large size of the human brain provides protection against injury and disease, and promotes longevity. It proposes that individuals with larger brains have more neural resources that can compensate for brain damage or decline in cognitive function. For example, studies have shown that people with higher brain volume are less likely to develop Alzheimer's disease or show symptoms of cognitive decline.
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