Anew fossil is found, and scientists are debating whether it can be considered a part of the human genus homo. what piece of evidence would best indicate that the fossil is human?

large jaw bone for muscle attachment

pelvic blades rotated inward

very long arms

thick rib cage

The piece of evidence that would best indicate that the fossil is human is pelvic blades rotated inward. Humans have this kind of a pelvis, whereas other animals do not. 
Many other animals have large jaw bones and thick rib cages, and there are numerous types of primates other than humans that have very long arms.