When a neuron is covered with an insulating fatty material, it is:

Prior to emerging adulthood's classification as a distinct age group, competitive extreme sports were essentially nonexistent

Indicate whether this statement is true or false.

Dimitri was very active in the third trimester. As a 1-year-old, he will probably

A) handle frustration well. B) be very fearful. C) refuse to interact with unfamiliar adults. D) be easily frustrated.