Pepsin is an Enzyme that is found in the stomach to break down protein.The Pepsin breaks the protein down into smaller peptides at low pH vale.
There is also one within the small intestine called Chymotrypsin and also the Carboxypeptidase.
Hope this helps and if you are still unsure read up on these to help you.
The answer would be
D) Kicking a soccer ball
Skeletal muscle controls just about all of your body movement. When you are digesting lunch you are not moving. When your body is moving blood through arteries, your body is not moving. When your heartbeat is increasing you are not moving. But when you move to kick a soccer ball you are moving. Thats why this action would be completed by skeletal muscles.
50% HAHAS
50% HSHS if you put in punnet square