The answer should be D) Behavioral.
Process of elimination, cant be A) X- ray cause that for screen shots on what is inside u, autism is a mental disorder, u cant see it.
Cant be B) cause u cant detect mental disorders through a blood test.
Cant be C) cause that is measuring weight and height.
This is beneficial and is actually an adaptation of humans to climates with larger amounts of sunshine. The darker color of skin helps prevent damage such as sun burn.
I believe it's true hope it works
Animal cells migrate during morphogenesis. not plant cells
Physical structures..........
