Question

freshwater biomes
rivers and streams
freshwater biomes include rivers, streams, ponds, lakes, and wetlands.

water moves the fastest in rivers and streams. this movement dictates the types of vegetation that can exist in this biome.

rivers and streams produce a lot of insect larva that hide under rocks, arthropods such as crayfish, and fish such as trout and salmon, especially in cold water.

aquatic organisms that live in rivers and streams are constantly dealing with which of these properties of water?

• the size of the water
• the stillness of the water
• the movement of the water

Explanation:

The text about freshwater biomes (rivers/streams) and aquatic organisms' interaction with water properties. The key info: water moves fastest in rivers/streams, and this movement affects the biome. The question asks which water property organisms in rivers/streams deal with. The options: "size of water" is irrelevant, "stillness" contradicts the fast - moving nature of rivers/streams, while "movement of the water" matches the description of water movement in rivers/streams affecting the biome and organisms.

Answer:

the movement of the water