Which of the following describes common physical changes experienced in adulthood?

In adulthood, individuals typically undergo several physical changes that are part of the natural aging process. The option that identifies common physical changes experienced in adulthood correctly emphasizes that adults may see changes related to hair, skin, muscle mass, and lung function.

As people age, it's common for hair to thin or gray due to changes in melanin production, and skin may experience a loss of elasticity, resulting in wrinkles. Additionally, muscle mass tends to decline with age, a condition known as sarcopenia, which can affect strength and mobility. Lung function may also decrease, leading to reduced respiratory capacity and efficiency.

This option encapsulates the broad range of physical transformations that occur during adulthood, highlighting the complexity of physical development rather than focusing on isolated improvements or growth. In contrast, the other choices do not accurately reflect the changes typically observed during adulthood; for example, substantial growth in height and weight is more characteristic of childhood and adolescence rather than adulthood.