Name three roles or jobs that are the most important in our world and explain why?

Why does less erosion & more deposition take place on the outside bank of a meander?

What is the missing step in solving the inequality 5 - 8x < 2x + 3?

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava