Final answer:
Middle adulthood spans from the mid-30s to the mid-60s, encompassing both physical signs of aging and increased health risks, as well as significant psychological development tasks such as generativity versus stagnation.
Step-by-step explanation:
The span of years that fits within the developmental stage called middle adulthood is from the mid-30s to the mid-60s. This stage is marked by significant life events and physical changes. Individuals in middle adulthood often focus on raising a family and attaining career goals. It is also during this time that signs of physical aging become apparent, such as the development of wrinkles and gray hair. Additionally, health risks increase, with diseases like type 2 diabetes, cardiovascular disease, and cancer becoming more common.
Middle adulthood is also a critical time for psychological development, where the concept of generativity versus stagnation plays a role. Generativity involves contributing to the development of others and finding one's life's work, while stagnation refers to a lack of productivity and self-improvement.