Fill in the following blanks with suitable words :

(a) Decomposer organisms are……………. in their action.

(b) In nature, all green plants are……………. whereas animals are consumers.

(c) A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a…………….

(d) The science that deals with the inter-relationships of living things with one another and their environment is called …………….

(e) Plastic is a……………. material whereas paper is a……………. material.