If you skip the cool-down portion of exercise,

The question says, then crust,mantle and core are all parts of. The correct option is D. They geosphere is there solid part of their earth and it includes the rocks, minerals, abiotic part of their soil, skeleton of dead animals, etc. The geosphere is formed by the process of rock cycle, which involves metamorphism,melting and solidification, weathering, erosion, etc.

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!