The oyster mushroom is a:

Explanation

The correct answer is that the oyster mushroom is a predator. It has developed a unique mechanism to capture and digest nematodes, which provides it with nitrogen that supplements its growth, making it a predator. Although many fungi are saprophytes, decomposing dead organic material the oyster mushroom specifically targets living nematodes as part of its feeding strategy. It is not a parasite, as it does not primarily rely on living hosts for nutrition, nor is it photosynthetic, as it lacks the ability to perform photosynthesis.