For the same speed, the acceleration of the object varies with the radius of curvature.

For the same radius of curvature, the acceleration of the object varies - (directly, inversely) with the speed of the object. if this helps

Explanation:

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

option number c is the right answer.