False, I'd say. Mammals usually adapt based on environment. Now, I know predators are "apart" of the environment, but I don't think that'd be it. I'd bet more money on saying mammals evolve based on environment adaptation. Sorry if I didn't answer your question or if I didn't get my point across well.
Lack of antibodies because thats the stuff to fight things away
The answer is....... (drumroll)........ lipids!
I would say its A because it is doing something harmful
