Fact 1: Lions live in social groups called prides.

Fact 2: Lions are also pack animals with fairly large prides of up to twenty.

Given the two facts above, answer the question "Lions live in social groups of up to twenty in their what?" with the following options: 
- power
 - house
 - forest
 - form
 - den
 - H 2 O
 - pack
 - genus


 

       pack  