Erosion and deposition occur side by side​

Explanation:

Ans: Flowing water picks up soil particles, and carries them along until the flow ebbs and the particles sink to the bottom. ... Anything that reduces the energy of the flow field can cause larger particles to drop below the critical Reynolds number and drop out of the fluid stream (deposition)

True because that the materials taken from the erosion process are later deposited elsewhere.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.