Muscles that are under your control. Smiling, turning a page in a book and getting out of you chair are some examples.

A. Cardiac muscle
B. Skeleton muscle
C. Muscles in the digestive system
D. Muscles in the blood vessels

These are B. The skeleton muscles.

Explanation:

Cardiac muscles is like with your heart and breathing, which is always happening and you do not control it. Same with digestive system and blood vessels, they are happening naturally and you do not have to think about digesting food or blood flow in your body. But the skeleton muscles are muscles connected to your limbs and you control how you move, whether you are walking or raising your hand etc. (I appreciate Brainliest if you can)

the answer is life structure

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