Question

dissolved oxygen
water temperature
dissolved oxygen is crucial for aquatic life, as most creatures need it to breathe in water. the suitable levels of dissolved oxygen vary depending on the species. for instance, trout and salmon need around 10 parts per 1,000,000 or more. some fish, like gar, can adapt to almost no dissolved oxygen by breathing air. there are factors that can affect the amount of dissolved oxygen in the water including water temperature, water movement, and aquatic life.
the waters temperature affects dissolved oxygen. higher temperatures lead to less dissolved oxygen in the water. fish move to find suitable dissolved oxygen levels, typically going deeper into cooler waters during hot seasons. fishermen use these thermal changes to their advantage, monitoring temperature shifts to locate fish.
which of the following is a factor that affects the amount of dissolved oxygen in water?
the waters color
the number of predators
the ph level of the water
the waters temperature

Explanation:

The text mentions that water temperature is a factor affecting dissolved oxygen in water. Higher temperatures lead to less dissolved oxygen. Other options like water's color, number of predators, and pH level are not mentioned as factors in the provided text.

Answer:

the water's temperature