QUESTIONS ON MARINE BIOLOGY-

Why are estuaries important? Give eight reasons.
Why must organisms in an estuary have special adaptations? Give three examples.
How do estuaries compare to other areas in terms of production?
What is the main source of "production" in an estuary?
What is detritus and why is it important? Explain.

I can come up with some reasons but this topic is confusing! Please help!