Answer:
A:environment strongly influences Mendelian trait expression
Explanation:
Hopefully this helps!
They were similar to modern humans in that they were bipedal (that is, they walked on two legs), but, like apes, they had small brains. Their canine teeth were smaller than those found in apes, and their cheek teeth were larger than those of modern humans.
They are both ectothermic, but fish have gills, and reptiles have lungs.