Ethan is just two weeks old. his mother strokes his cheek and he turns toward the touch and opens his mouth. this is called the

The answer to this quesiton is  rooting reflex
 rooting reflex refers to the type of movement that rooted inside our brain and will be done without being conciously learned.
Examples of rooting reflex. Crying when feel distressed, laughing when feel pleased, infants sucking everything that being put in mouth, etc.

Your answer is a distributive