What is the ability of the body to function successfully and efficiently during physical activity?

I believe this question should be in Health, however, I'll answer it to the best of my ability.

Physical fitness.  

Physical fitness can be achieved through a set diet, physical excersise (of course), rest, and many cardiovascular exercises. It is the ability of the body to successfully function efficiently during PA. 

Ithink the answers is b i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you