The fossil record indicates that lived in families of male-female pairs, used fire, and left evidence of social cooperation (lived communally).

The fossils record indicates that THE HOMO ERECTUS lived in families of male female pairs, used fire and left evidence of social cooperation. 
The Homo erectus refers to an extinct species of  an early period human. From the fossils records obtained, it is believed that, the species had shallow forehead, big brow bridge and their brain is about one third of that of present humans. They are believed to live in pairs, they also engaged in social cooperation.   

They both determine the exact age of rocks.

1. protection 2. homeostasis 3. storage4.blood formation5.bone marrow 6.movement