The answer is A-Sand
I took a test with that same question and I got it right!.
1. Structural proteins, maintain cell shape, akin to a skeleton, and compose structural parts of the body, like cartilage and bone in vertebrates.
2. Storage proteins house critical elements that your body needs.
3. Hormonal proteins basically act as your body's chemical "messengers."
4. Enzymes, which are biological catalysts needed for chemical reactions.
Single celled organisms can die in an instant if they don't maintain homeostasis, or balance in their bodies.
