All things that make up the environment are (a) —. The way in which people, animals and plants are

related to each other and to their surroundings is (b) — as ecology. The (c) — is a complex web that (d) — animals and plants and every other life form in the biosphere. All these things (e) — together. The system is in a steady state of dynamic (f) — which means that by (g) — any one part of the web you can affect all the other parts. For (h) —, the destruction of forests may have serious (i) — consequences on humans and animals. It is the (j) — of human beings to prevent the environment from being spoilt.