Suggest one word for each of the following statements/definitions.
(a) The physical and biological world where we live in.
(b) Each level of food chain where transfer of energy takes place.
(c) The physical factors like temperature, rainfall, wind and soil of an ecosystem.
(d) Organisms which depend on the producers either directly or indirectly for food.
(a) Biosphere (also environment)
(b) Trophic level.
(c) Abiotic factors.
(d) Consumers (also heterotrophs)