Huh do you mean like a heartbeat???
The right answer is A.
Antimetabolites are used as a drug that disrupts metabolism (chemical processes necessary for the functioning, growth and reproduction of normal and cancer cells). These molecules have a structure similar to those of metabolites, there will be a competition between metabolites and antimetabolites to bind to enzymes.
Antimetabolites are used as a cancer treatment to destroy cancer cells.
Well the hormone would be one thing. I'd say because it strengthens our heart muscles and trains our breathing pattern to be more effective. These would lead to more efficient transportation of blood and hence oxygen to our whole body including our brain. Our brain becomes more alert, and our body more energetic.
The answer is A- plz mark as brainliest :)
