A) action of rivers and tides
B) depth at which photosynthesis can occur
C) amount of rainfall received
D) height of water table
Correct Answer: A
Solution :
Estuary is the end of river where freshwater and salt water mix as they meet. It acts as a nutrient trap; as the sides bring nutrient from the sea and at the same time, they prevent the seawared escape of nutrient brought by the river.
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