The correct answer is C.commensalism; parasitism
At first it is a commensalism relationship which becomes parasitic when the living cells get attacked.
The defining characteristic of the intertidal zone is that it is submerged with water during high tide and exposed to the air during low tide. The zone can take many forms, from sandy beaches to rocky cliffs. It is common for the intertidal zone to change frequently, since it is constantly battered by crashing waves.
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Answer:
environment is the surroundings or conditions in which a person, animal, or plant lives or operates or the natural world, as a whole or in a particular geographical area, especially as affected by human activity. hope this helps
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