Which of these would be most likely to be considered a geographic "push factor"?
a)
religion
b)
overpopulation
c)
economic freedom
d)
political liberty

Do you guys know all the answers to this

What causes heat transfer in fluids

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