The desert runs through west and central africa. it extends from the atlantic ocean to the ocean. farmers here practice agriculture, moving to a new location when soil nutrients are used up.

What group has historically made up the largest portion of immigrants in mexico?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Which two following best identify the central themes of this speech in the passage the man in the arena