Which term refers to the use of strength to hold the body's position?

a. 

agility

b. 

balance

c. 

power

d. 

speed

Th e correct answer is B. Balance

Explanation:

Balance is an ability of a body to maintain the line of gravity with negligible postural sway. Sway is the horizontal movement of the center of gravity of a body if a body is standing still.

If you want to stay for a long period of time in one position without movement, then you need  balance. So the term refers to the use of strength to hold the body's position is balance.

Agility refers to the flexibility of the body or jumping

Power means Strength in general

Speed is the ability that how can a person run fast.