I think it’s A. hope this helps
option 2 seems appropriate for me!
A- non-native species can have positive and negative affects
Answer: skull size of each species
Over time, it is the size of the skull particulary that of the jaw bones, that can help determine the evolutionary relationship of two hominid species. It was believed that the jaws of hominids change as time passes by because the size of the brains changes too.
