Question

despite its name, the pacific sea horse is actually a type of fish. its horse - shaped head gives it its name. this creature lives in the pacific waters off the west coast of the americas, from peru to southern california. like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment. when a pacific sea horses body loses water to its environment, which process is responsible? osmosis facilitated diffusion exocytosis protein - assisted diffusion

Explanation:

Osmosis is the movement of water across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration. In the case of the Pacific sea horse in a saltier environment, water moves out of its body by osmosis. Facilitated diffusion involves the movement of molecules (not just water) with the help of transport proteins. Exocytosis is the process of releasing substances out of the cell. Protein - assisted diffusion is a form of facilitated diffusion. Since the question is about water movement due to a concentration gradient, osmosis is the correct process.

Answer:

osmosis