Final answer:
Option (3). Skeletal muscles are the voluntary muscles that can be controlled by an individual's will, such as those used to move your arm. Smooth muscle and cardiac muscle are involuntary and cannot be consciously controlled.
Step-by-step explanation:
The type of muscle that responds to an act of the will, such as your arm muscles when you reach over to turn the TV dial, is the skeletal muscle. These muscles are voluntary muscles and can be controlled by an individual's will. In contrast, smooth muscle and cardiac muscle are types of involuntary muscles, which means they cannot be consciously controlled by will. For example, smooth muscles move food through your digestive system, and cardiac muscles are found in the heart, pumping blood through the circulatory system.