The people of the OLD STONE AGE learned to build fires. This was helpful because they could . . .

This was helpful because they could keep warm and cook food.

Explanation:

brainiest please

i disagree that there is little difference between adult female development and adult male development. sociological studies comparing female and male pathways to adulthood, revelead that there are sustancial differences between them. particularly, female and male differ from timing of marriage, when they began to live with children and the likelihood of combining wife/husband and parent roles.