What is the relationship between exposure to a virus and developing and immunity to it
?

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?

Ineed ! i have no clue how to do this problem.

How do dying stars contribute to the formation of planets