Read the following text and fill in the blanks with suitable words from the box. There are more words than needed. Make any grammatical change if necessary: hang sake balance ecology link alter ecosystem know responsible rise example fixed interrelated world 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, 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. It is the (j) ______ of human beings to prevent the environment from being spoilt.