I think the answer is botany
Hydrogen bonds.
The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together
The answer is B hunting ans poaching the animal for its horn
I believe it is b. The rest don’t really work or make sense