In the absence of unbalanced forces, it is the natural tendency of an object to
(answer all that are correct):
a. keep its velocity constant
b. maintain its state of motion
c. if the object is at rest, it will remain at rest.

All are correct

Explanation: An object will stay in motion and objects at rest will remain at rest unless there is an unbalanced force acted upon them.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods