Scientists who study the anatomy of the systems in the human body focus their studies on only the function of the organ systems in the body.

only the structure of the organ systems in the body.

the function of the organs and organ systems in the body.

the structure of the organs and organ systems in the body.

Explanation:

Scientists who study the anatomy of the systems in the human body focus their studies on the structure and form of an organism. Particularly, they examine the relationships among parts of the body, as well as the structure of individual organs.

a. by using fur or clothes to trap heat energy near the body