What is Bar, stack, headland and spit

According to speculation and study, what will happen to the global birth rate in about 40 years? (1 point)

This image shows a volcanic eruption in hawaii with lava flowing into the sea. which statements best describe this eruption? check all that apply. its magma is high in silica. its magma has low viscosity. its lava came from a quiet eruption. its lava sets fire to everything in its path. its lava came from an explosive eruption.

How has plate tectonics affected the climate of south america?