Help pls i really need help

Write a paragraph at least 10 sentences explaining how rocks are used today in society

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density