One of the changes in development and specialization that did not happen in primitive mammals was the increase in stomach capacity. The specialization of teeth and the lower jaw are two important modifications of the primitive mammals. Also an increase in size and brain capacity are two crucial modifications of the early mammals.
The correct answer is a. with; diffusion
It is c I believe cause the human cells can’t make their own food like plants do when they photosynthesis
I think it is the second answer, sorry if it is wrong/didn’t help.
