The correct answer is- Intraspecific competition.
Intraspecific competition can be described as an interaction in a population where members belonging to the same species compete for a limited resource ( such as food, and water).
As per the information given in the question, both organisms ( grizzly bears) belong to the same species and compete for fish, which is food for them.
Thus, it is an example of Intraspecific competition.
To learn more about Intraspecific competition click here:
https://brainly.com/question/17003911
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