Which two forces drive the rock cycle?

a. weathering and erosion
b. transportation and deposition
c. mineral composition of existing rock and time
d. earth's internal heat engine and the water cycle

D. Earth's internal heat engine and the water cycle

Explanation:

The rock cycle is driven by the earth's internal heat engine and the water cycle.

The internal heat engine furnishes the earth with the required energy. The energy is used to melt rocks within the earth crust and to initiate convective cells in the mantle. This causes rocks to melt and plates to move. As this occurs, igneous and metamorphic processes takes place.

The water cycle is greatly responsible for the weathering and erosion of rocks. Through these processes of denudation, sediments are formed and deposited within basins on the crust. The action of runing water and glacier plays a very significant role in forming sedimentary rocks.

The interplay between the internal heat Engine and water cycle moves crustal materials to deeper levels of the earth and also deep seated materials to the crust.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.