All fungi are

a. symbiotic.

b. heterotrophic.

c. flagellated.

d. decomposers

b. heterotrophic is the correct answer.

Explanation:

All fungi are heterotrophic because they cannot produce their food, they get their food by consuming organic compounds from the external or environmental sources.

fungi do have chlorophyll pigment and they are not able to produce their food from the sunlight and water.

heterotroph are those who cannot manufacture their food, they depend on external sources to get food and energy.