k, let me throw u a situation.. if i grew up w/ my sister and no other people around, eventually i'd develop my sexual organs and start having urges.. so your telling me i will just innately know that she is my sister and that having sex w/ her is wrong.. .... riiiiiggghht.... .. false, if i grew up being told by everyone that having sex w/ family members was the way things were done and i saw my family members acting in such a way i wouldn't hesitate to act as such... it is a social construct to act as we do in the face of incest.. and a good one (i am not in support of it because it can bring about mutated offspring).. if it didn't, i'd be more reluctant to immediately throw out the idea
they forgot Human at the top of this
Killer whales or orcas eat sealions
Polar bears eat seals.
Lions can kill other predators such as leopards, cheetahs, hyenas, and wild dogs, but seldom devour the competitors after killing them.
Wolves can kill pumas and other predators.