Answer:
The word biology is about An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi.
Explanation:
B)landform 2 is what was made by the deposition of sediments
Estuaries are a large group of small fish that use coral reefs to protect them
Explanation:
The definition of watershed is
"any point on uphill from where water flows downstream wither in the form of river, stream or rain water".
From the definition we can say that watershed (either natural or man made) would me anything that is present in that area where the water flows downstream to houses, parks, and dams.
I have attached picture for better understating.