Can some help please? Where, in the cell, does the process below occur?

What does it mean for a cell membrane to be selectively permable

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

Does anyone know what the schooling version of sos mean? example