The correct answer is "reefs".
Shallow-marine environments are considered to be an area among the shore and deeper water, along with a reef wall or a shelf break. This surroundings is characterized by means of oceanic, geological and organic conditions, as described underneath.
To all parts but particularly u can say phloem sap
I think that they both measure energy
False, atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes
