Which of these organizations evolved out of the Pan-Africa movement?

Physical features of central america look at the map above which of the following is true

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

At which boundary does subduction stop occurring, resulting in a mountain range?