Question

which muscle type is under voluntary control?
skeletal
cardiac
smooth/visceral
porous

Explanation:

Skeletal muscle is under voluntary control as it is attached to bones and is responsible for movements that we can consciously control. Cardiac muscle (in the heart) and smooth/visceral muscle (in internal organs like the stomach) are under involuntary control. "Porous" is not a muscle type.

Answer:

skeletal