Horace, the youngest child of a high school athletic director, was able to roll over at 3 months, crawl at 6 months, and walk at 12 months. This ordered sequence of motor development was largely due to

a. habituation.

b. imprinting.

c. maturation.

d. conditioning.

eresponsive parenting.

c. maturation.

Explanation:

Maturation: In psychology, maturation is described as a process of a person's development in which he or she matures or reaches to one's full functionality. Generally, earlier it used to examine exclusively biological forces, for example, the ageing process, that is being involved in a child's behavioral change.

Types of maturation:

1. Cognitive maturation - bodily change.

2. Physical maturation-development in the thinking-pattern.