Which factor influencing flexibility is dependent upon individual behaviors?

a. joint structure

b. muscle and fat

c. age

d. gender

The right answer is B muscle and fat

A: False because the joint structure does not depend on the individual behaviour, it may depend on hereditary and genetic factors.

C: false because the age is not related to the behaviour, and so the gender, they are factors that the individual cannot control

So, the right answer is muscles and fat since the individuals can control them by exercising and eating.