Answer:
All your going to do is right down what you see and what it's doing for the first question and then if you have any questions does that awnser your question?
Answer:
If you have been to Venice (Italy), you have seen lagoons. In fact, the world lagoon is derived from a latin word <em><u>laguna</u></em>.
Principally, a lagoon is shallow water body which has been separated from the main water body due to sandbars, barrier islands, coral reefs,etc. However, sometimes, they includes other terms too such as bays, estuaries, sounds, or even lakes. They are of two types, i.e. Coastal Lagoons and Atoll Lagoons. In the figure attached, you can see how a lagoon looks like.
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EXPLANATION
Barnacles belong to phylum Crustacea.
That she grows in a steady rate and doesnt die fast and she remans healthy