(a) (i) List three components of an ecosystem (ii) Describe briefly the interaction among the components named in (a) (i). (b) List three major steps that a...

(a) (i) List three components of an ecosystem (ii) Describe briefly the interaction among the components named in (a) (i).

(b) List three major steps that are usually taken in studying plants and animals in community.

(c) State the importance of each of the following in a population and explain how each affects the growth of a population:
(i) competition; (ii) pathogens; (iii)water.