The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory.
Which of the following animals lives in the most polluted water?

blood worm
2 )
caddis fly larva
3 )
leech
4 )
stonefly nymph
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!