In a chemical reaction, which aspect of the reactants changes? a
arrangement of the atoms
o total mass
O name of each element
O nuclei

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

answer///africa and asia;

the species living around the vents are especially good at dispersal.  

deep-sea vent originates on the floor of the ocean when seawater circulates through hot volcanic rocks, usually situated where the new oceanic crust is being produced.  

biological dispersal refers to the movement of species from their location of birth to their site of breeding, or from breeding site to another. similarly, the oceanic dispersal refers to the movement of the species from one land mass to another by sea crossing.