What the difference between reduction and decrease ?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

One of the reasons that stars are so large is because

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above