Final answer:
In late adulthood, cognitive abilities such as fluid intelligence, reasoning, and memory start to decline. However, engaging in mentally and physically stimulating activities can delay cognitive decline.
Step-by-step explanation:
In late adulthood, which typically begins in the 60s, cognitive abilities such as fluid intelligence, information processing abilities, reasoning, and memory start to decline (Hertzog, Kramer, Wilson, & Lindenberger, 2009; Larson et al., 2006; Podewils et al., 2005).
However, it's important to note that cognitive decline can be delayed through engaging in mentally and physically stimulating activities. Research has shown that adults who participate in such activities have a reduced incidence of mild cognitive impairment and dementia (Hertzog, Kramer, Wilson, & Lindenberger, 2009; Larson et al., 2006; Podewils et al., 2005).
Therefore, it's never too late to start engaging in activities that keep the mind and body active in order to maintain good cognitive health as we age.