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.

Africa has 54 countries

Dropping a dry bar of soap on the ground won’t clean it, by it will pick up germs from the ground so the soap would be dirty