During sensitive or critical periods, children appear to be especially responsive and able to learn from specific kinds of .

Stimulation

Explanation:

This is referred to as a  section of psychology that is responsible for  identifying and explaining continuities and changes that humans during their lifetime.

This is simply known as the study of the every changing, cumulative, and growth changes in the physical, cognitive, and social-emotional development of children and adolescents.

The essential qualities of developmental changes includes;

1. Persistent

2. Cumulative

3. Progressive

This is concern with the period or time when a child is especially responsive and able to learn a particular skill. It is essential for children to have a good learning environment during these sensitive and critical moments.

answer; i do believe that its(gestation,suction-aspiration or vacuum aspiration;

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."