Fact 1: Building housing developments usually requires replacing animal habitats.

Fact 2: An animal's habitat is where it lives.

Given the two facts above, answer the question "building housing developments usually requires replacing where an animal what?" with the following options: 
- humans
 - trees
 - lives
 - dogs
 - houses
 - cells
 - biome
 - Frogs.


 

   lives      