B) Fungi and bacteria are microorganisms that are important to the economy of the country. Food and agriculture industries depend a
lot on both these organisms. Discuss how these organisms can
help to improve the economy of the country now.

Well fungi and trees have a mutual relationship that the tree gives the fungi what it wants and in return the fungi gives the tree food and energy. So fungi can help more trees to make more trees to help the environment. Bacteria usually eat dead things so to get rid of living waste(animals, wood, etc)

Explanation:

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.