(25 points} {brainliest} pls help <3 What is the role of synovial fluid in synovial cavities?

A. Lubricating cartilage at joints
B. Assisting in digestion
C. Moisturizing and filtering air before it reaches the rest of the body
D. Storing hormones needed to respond to stress

i think the answer is a.keratin is the pigment responsible for skin color.

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.