How do large corals differ from small corals

Hard corals that form reefs are called hermatypic corals. Soft coral, also known as Alcyonacea and ahermatypic coral, do not produce a rigid calcium carbonate skeleton and do not form reefs, though they are present in a reef ecosystems.

sorry if that all I can found.

i am positive it is c. condensing but i may be wrong

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.