Which form of communication among primitive peoples is closest to writing?

Pictogram        

Explanation:

Primitive People are the earliest existence, especially at an early age when the human population was not in an extent spread over the World.  Primitive people use the pictogram form of communication among themselves due to lack of language and writing. Drawings and paintings produced to tell stories and have knowledge. The oldest known form of communication were cave paintings. In early society, people use cave murals to record their cultural stories like hunting, wars, and cultural accounts.

i believe the answer is a