7. Very few people have a definite and pure somatotype

TRUE

Explanation:

William H. Sheldon, PhD, MD, introduced the concept of body types, or somatotypes, in the 1940s. Since then, nutritionists, exercise physiologists, and even doctors have used it to help design effective, individualized fitness plans. The gist is that everyone falls, though not altogether neatly, into the three categories below. Keep in mind that these are generalizations, and that most of us have characteristics of two or even all three somatotypes.

the correct answer is d