Fact 1: Behaviors can be learned through play.

Fact 2: Girls have played with dolls for generations.

Given the two facts above, answer the question "Girls have used what to learn behaviors for generations?" with the following options: 
- Birds
 - trees
 - rainbows
 - sound
 - alleles
 - bows
 - nerves
 - dolls


 

        dolls 