Answer:
D: Random
Step-by-step explanation
The term "population distribution pattern" refers to the method or form in which population of a certain organism living in a certain area occupy that area.
For example: Uniform distribution pattern in which organisms are arranged in a equal or regular manner in the area. This gives a competition to the organisms of the area with reference to each other.
If we talk about Oysters, they are able to travel many and many kilometers across a certain area. Therefore, they don't stay at a place in a regular manner and this gives them random distribution pattern.
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