Please match them together

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity