Question

which of the following is an example of a structural adaption that an animal may develop if a habitat starts to have a slow decline in the amount of water available to drink? (1 point)
if water slowly begins to become scarce, an animal may develop communication methods through a type of call that allows them to notify others of its species where water is located.
if water slowly begins to become scarce, an animal may develop pack habits that allow them to spread out and locate water faster.
if water slowly begins to become scarce, an animal may over time develop a way to store more water in its body.
if water slowly begins to become scarce, an animal may start migrating out of the environment to one that has more water.

Explanation:

A structural adaptation is a physical trait an organism develops. When water is scarce, developing a way to store more water in the body (like a camel's hump) is a physical change. The other options are behavioral (communication, pack habits, migrating) or not adaptations to water scarcity in the same way.

Answer:

If water slowly begins to become scarce, an animal may develop a way to store more water in its body.