You need essential amino acids in your body, because you can not make them. If you do not have any in your diet proteins break down resulting in muscle loss and problems with repair. Amino acids are building blocks of protein. So he won't be able to build protein.
What graph? Can you send me a pic of the graph because otherwise i cant answer the question.
The three types of symbiotic relationships are commensalism, mutualism, and parasitism.
Commensalism: One organism benefits from the symbiotic relationship while the other remains unaffected. Example: Barnacles and whales.
Mutualism: Both organisms benefit in the symbiotic relationship. Example: Humans and the bacteria in their digestive tract.
Parasitism: One organism in the symbiotic relationship benefits at the other organism's expense. Example: Fleas and dogs.
I say A because the way the question is formatted it is clear that...
