(a) (i) What is a habitat? (ii) Explain briefly three roles of a decomposer in an ecosystem. (b) Explain briefly energy flow in a freshwater habitat. (c) (i...

(a) (i) What is a habitat?

(ii) Explain briefly three roles of a decomposer in an ecosystem.

(b) Explain briefly energy flow in a freshwater habitat.

(c) (i) State three harmful effects or microorganisms to plants

(ii) State six beneficial effects of microorganism to humans.