It is the elephant’s great desire for food that makes it both a disturber of the environment and an important builder of its habitat.In its continuous search for the 300 pounds of plants it must have every day,it kills small trees and bushes,as well as pulls branches off big trees.This results in numerous open spaces in not only deep tropical forests but also the woodlands that cover part of the African savannas.In these open spaces,there are numerous plants in various stages of growth,which attract a variety of other plant-eaters.

　　Take the rain forests for example.In their natural states,the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor.By pulling down trees and eating plants,elephants create open spaces,allowing new plants to grow on the forest floor.In such situations,the forests become suitable for large-hoofed plant-eaters to move around and for small-sized plant-eaters to obtain their food as well.

　　Scientists are worried now that the African elephant has become an endangered species.If the elephant dies out,scientists say,many other animals will also disappear from vast areas of forests and savannas,greatly changing and worsening the whole ecosystem.

　　【语篇导读】本文是一篇说明文,文章主要介绍了非洲象对非洲大草原生态系统的巨大影响。

　　5.It can be inferred from the passage that the African elephant 　. 

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