Passive immunity because animals are passive.
I think the answer should be : Animal.
Answer: It would not be affected too much by the acid rain, because when the jet stream flows into the parts of the USA, it brings acid along in the stream. However, a lot of acid is lost. By the time it reaches Skaneateles (a town in Onondaga County, New York) the stream has already traveled a long distance as a result losing an ample amount of acid on its way.
