OPT:
A). bloodline
B). existence
C). biome
D). planet
E). clams
F). Mammal
G). abalone
H). genus

Fact 1: Competition may cause animals to fight towards members of their own species. Fact 2: Species is a property of genus, genus is a property of family, etc. Given the two facts above, competition may cause animals to fight towards members in the same what?
Answer:
H).