each
People often (! ) many wild plants when they start to
in a new plce. fsuch
plants decrease, (2 ) that eat them cannot get enough food. In one part of the United
States, for example, there were wild roses, mule deer and mountain lions. Their (3 )
kept a good balanee. But when people started to live close to them、 many of them (! 由
People noticed that it is important to keep the balance of nature.
[find / died / insects / destroy / lives / animals / numbers /increased 1