What event typically causes upwelling?

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

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?

Can someone me with questions 12 and 13 plz.