Answer
a. not science
b. science
c. science
d. science
e. not science
Work Step by Step
a. History is not science because past events, while possibly inclusive of the natural environment, are not in it of itself the natural environment.
b. Ornithology is science because birds are an aspect of the natural environment.
c. Paleontology is science because fossils are the natural remains of dead animals, and are therefore a part of the natural environment.
d. Zoology is science because animals are part of the natural environment.
e. Phrenology is not science because it determines psychological traits from the shape of the head, an idea which is no longer considered valid and therefore cannot be science.