Ryo is an adolescent and enjoys solving challenging problems. His ability to stay on task without becoming distracted by the sounds around him and his ability to adjust his problem-solving strategies as the problem changes is referred to as , which peaks at age .

Options for the question have not been provided. They are as follows:

A)executive function; 16

B)executive function; 25

C)cognitive fortitude; 28

D)mental hardiness; 32

B)executive function; 25

Explanation:

Executive function is a set of cognitive processes that keep developing well into adulthood (till late 20s). It includes controlling attention span, planning, inhibiting automatic responses to stimuli, prioritizing and controlling working memory. All these functions help the person to stay focused on their goals and successfully adapt themselves to solve problems. Ryo is showing these traits hence he is developing executive function skills. These skills will be at peak in late 20s after which they will start to decline.

answer; genes dictate the production of specific enzymes, and affected individuals have genetic defects that cause them to lack certain enzymes;