1.When you increase the pressure of a moving fluid, the speed of the fluid will
increase.
2.During a windstorm, the roof on a house can fly off because the pressure in the
house is lower than the pressure outside.

i don't know. the other person does though.

(nitrogen fixation) will be your answer sorry if im wrong

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.