Final answer:
Middle adults are at risk of experiencing a midlife crisis, which is characterized by physical signs of aging and an increased risk of health problems.
Step-by-step explanation:
The type of people who are at risk of experiencing an actual midlife crisis are those who are in middle adulthood, which typically lasts from the mid-30s to the mid-60s. During this stage, individuals may experience physical signs of aging such as wrinkles and gray hair. The risk of health problems also increases, with diseases like type 2 diabetes, cardiovascular or heart disease, and cancer being common in middle adulthood.