Fact 1: Insects may live in large colonies and have complex social behaviors.

Fact 2: Insect colonies Insect colonies are families because all members are close relatives.

Given the two facts above, answer the question "Insects have more social behaviors because all what?" with the following options: 
- have a positive impact on the environment
 - it helps plants in growing
 - retaining heat
 - mate with females
 - produce offspring
 - family members are relatives
 - characteristics
 - sub-units of species


 

      family members are relatives   