The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion. The degree to which the particles move is determined by the amount of energy they have and their relationship to other particles.
Convection current is current which is caused due to the movement of group of molecules and also called difference in pressure and heat in earth
The convection current circulates in mantle when the earth spins whereas when the earth rotate it causes pull of matter in the mantle of earth.
As a result the earth rotation respond to mantle convection current where it travels.
hope it helps
Serratus anterior would be the primary muscle. Correct me if I’m wrong.
