What do the hypoblasts become and what will that structure do for the embryo? Will mark brainliest

it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time

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.