The Everglades encompass an entire biome. Biomes are defined by their climate and specific organisms and this is the case for the Everglades.
1. is (A) because mouse and deer are not in the same ecosystem.
2.is (D) because both antelope and domestic cattle do not affect each other.
3. is (B) because food is important factor.
4.is (C) because without home it is not possible to adapt in an ecosystem.
The correct answer is b, antigens