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, building housing developments usually requires replacing where an animal what?

Available options:
[i] humans.
[ii] trees.
[iii] lives.
[iv] dogs.
[v] houses.
[vi] cells.
[vii] biome.
[viii] Frogs..
Answer:
[iii]