(04.06 mc)
which environmental factor determines why coral reef populations are found only in shallow waters?
light is at its greatest concentrations.
predation is lowest.
salinity is more constant.
the temperature is warmer for reproduction.

Light is at its greatest concentrations

Explanation:

The coral reefs need several conditions so that they can survive. The most important though is the sunlight. The reason why the corals need sunlight is that they are performing photosynthesis, thus they need the sunlight to be able to do so. This sets a depth limit for the corals, as they can only survive at places where the sunlight can penetrate, thus in the shallow waters. It is also worth mentioning though that the majority of the corals also require warm waters to survive, but without the sufficient sunlight, the warm water will not help them a lot.

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