Final answer:
During mid-adulthood, cognitive abilities tend to remain steady or may even improve in certain areas. There is a decline in fluid intelligence, which includes information processing abilities, reasoning, and memory. Engaging in mentally and physically stimulating activities can delay the onset of cognitive decline.
Step-by-step explanation:
During mid-adulthood, cognitive abilities tend to remain steady or may even improve in certain areas. There is a decline in fluid intelligence, which includes information processing abilities, reasoning, and memory. This decline typically occurs in late adulthood. To delay the onset of cognitive decline, engaging in mentally and physically stimulating activities can be beneficial. Research has shown that adults who participate in these activities experience less cognitive decline and have a lower risk of mild cognitive impairment and dementia.