These are not the only acceptable answers, or even the best answers. These are just examples of good answers. The air and water circulation cycles are driven by the fact that more solar energy is absorbed at the equator than at the poles. The movement of tectonic plates is driven by convection in the mantle, which is driven by heat at the Earth's core caused by radioactive decay. Hot air rises in warm areas, travels to cold areas, and falls.
Cold air falls in cold areas, travels to warm areas, and rises.
In this way, heat from hot areas is transported to cold areas. In a similar way, an areas near a cold ocean current will experience a colder climate than other areas at similar lattitudes. Large bodies of warm or cold water will warm or cool nearby areas. As it cooled, the first solid rocks which formed were formed from the molten state, and so were igneous rocks. The text says that metamorphic rocks are made from sedimentary rocks.