Question

why is it important for plants and animals in estuaries to be able to tolerate a variety of salinties (amount of salt in the water? because lakes and streams meet there. because carbon dioxide is necessary for photosynthesis. because rivers and oceans meet there. rewatch submit

Explanation:

Estuaries are areas where freshwater from rivers mixes with salt - water from the oceans, leading to variable salinities. Organisms need to tolerate these changes to survive. The first option about lakes and streams is incorrect as it doesn't explain salinity variation. The second option about carbon - dioxide and photosynthesis is unrelated to salinity tolerance.

Answer:

Because rivers and oceans meet there.