8. Which force is responsible for pulling a plate downward into the asthenosphere?

O A. Gravity

O B. Buoyancy

O C. Air pressure

D. Magnetism

Answer: Gravity

Explanation:

Gravity is the force that attracts a body towards the centre of the earth or towards other physical bodies which contain mass.

Buoyancy is the ability or tendency of an object to float in a fluid. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the force of gravity on the liquid displaced by the object.

Air pressure is defined as the force exerted per unit area exerted against a surface by the weight of the air above that surface.

Magnetism is a physical phenomena which arises from the force caused by magnets, which are objects that produce fields that attract or repel other objects.

Thus gravity is responsible for pulling a plate downward into the asthenosphere.

Answer: A. Gravity