Question

read the paragraph.
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 horse’s body loses water to its environment, which process is responsible?
○ osmosis
○ endocytosis
○ exocytosis
○ active transport

Explanation:

The question asks about the process where a Pacific sea horse (a fish) loses water to its saltier environment. Osmosis is the passive movement of water across a semipermeable membrane from an area of lower solute concentration (fish's body fluids) to higher solute concentration (saltier seawater). Endocytosis/exocytosis involve bulk transport of materials, not water loss due to solute differences. Active transport requires energy for solute movement, not passive water flow.

Answer:

osmosis