"Natural selection<span> is the differential survival and reproduction of individuals due to differences in </span>phenotype<span>. It is a key mechanism of </span>evolution<span>, it is a change of </span>heritable traits<span> in a </span>population<span> over time"</span>
A mass movement that involves the sudden movement of a block of material along a flat, inclined surface is called a SLIDE.
Answer:
i believe its 3 because when erosion happens sand goes away it does not come back
