[2015·重庆一中一诊]The African elephant, the largest land animal remaining on earth, is of great importance to African ecosystem (生态系统). Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big planteater, it largely shapes the forestandsavanna (稀树草原) surroundings in which it lives, therefore setting_the_terms of existence for millions of other animals that live in its habitat (栖息地)．
