Answer:
They are in a parasitic relationship with plants.
Step-by-step explanation:
Mycorrhizae is a fungus root that has a mutually beneficial relationship with roots of the plants and not a parasitic relationship.
Mycorrhizae colonize soil and disperse its thick-walled spores produced on the extra-radicular hyphae. Mycorrhizae are important in natural systems and agriculture as it helps in the regulation of exchange of nutrients and sugar between fungus and plant.
Hence, the correct answers are "They are in a parasitic relationship with plants."