A Durable Power of Attorney for Health Care is a document that lets you name someone else to make decisions about your health care in case you are not able to make those decisions yourself. It gives that person (called your agent) instructions about the kinds of medical treatment you want.
He is contracting his muscles together to be able to pull the able up. It wouldn't be endurance because he isn't doing to repeatedly. Not resistance because there would be a pull back from the table. Not balance because he is stable on his feet so the answer would be strength