Answer:
The answer is parasitic.
Explanation:
Two different organisms can have three different types of relationship between them. Commersalism, in which one organism benefits from the relationship while the other organism is not affected. Mutualism in which both organisms benefit from the relationship. Parasitism in which one organism benefits from the relationship while the other is harmed.
The example given in the question describes a parasitic relationship because the fungus feeds off of the cells of the human while the human is harmed.
I hope this answer helps.