All fungi are

a. photosynthetic
b. heterotrophic
c. autotrophic
d. parasitic

I believe its 'B' because fungi cannot create their own food, meaning they must acquire it.

I think the correct answer from the choices listed above is option B. All fungi are heterotrophic since they are able to use the light energy from the sun to produce organic compounds such as carbohydrates, fats, and proteins from inorganic carbon dioxide and use it as their own food. 

What do you mean about innate behavior i don’t get it