Why use picture books in children's literature?

people use pictures in childrens books because it helps the learn what that picture,word ,and what that pictures role in life is,

for example-

picture- dog

what it its-a pet or a big fluffy animal that lives in a household

what sound it makes-ruff ruff

what dose it do-its your life long friend and conpanion

books that have pictures are multi sencory activites for children wich is a big part of their learning.