Ian is a seven-year-old boy who occasionally screams in the middle of the night. during these episodes, ian talks incoherently and will not wake up. which sleep disorder is ian likely experiencing?

a. a sleep terror
b. a narcoleptic episode
c. a nightmare
d. a sleep stressor

Ian is experiecing a sleep terror.

Explanation:

A sleep terror is a sleeping disorder that can affect a person of any age, and it is frecuently to appear in childhood. It is different from a nightmare  because of the specific characteristics of it. For instance it is very hard for a person to wake up when experiencing a sleep terror, it is followed by sweating and heart aceleration. The episodes repeat often.

Other syntomps that would appear, are abrupt waking up with agitation and screaming.

answer; ///he could not explain why the continents drifted;