Text-1 Read the text. Then choose the correct answer for questions 1-2

19. According to the passage,...
A) native insects and animals kill weeds and pests.
B) the chemicals ultimately cause serious soil loss.
C) the chemicals we use to grow food are both beneficial and harmful.
D) pesticides also support the wildlife in the region, and protect ecosystems and wildlife.


20. One can understand from the passage that fertilizers are used...
A) only when the crops are overgrown by weeds
B) to replace the nutrients that crops have taken out of the
C) because they have almost no ill effect upon the environment.
D) since they help to restore ecosystems.