Which of the following actions involves voluntary muscle movement?

movement of food through the digestive tract

movement of blood through the blood vessels

beating of the heart

making of faces

Option D is the answer.

Step-by-step explanation:

As we know there are two types of muscles, Voluntary and involuntary muscles.

Voluntary muscles are the muscles which we can control while involuntary muscles can not be controlled .

Examples of involuntary muscles are Smooth muscles present in GUT, blood vessels and cardiac muscles.

Examples of voluntary muscles are skeletal muscles like facial muscles.

Therefore, Option D, making of faces involves voluntary muscle movement.

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation: