The great range, running just inland along australia's eastern coast, is that continent's only
significant mountain chain.
a. australian
b. barrier
c. dividing
d. eastern

The answer to the question is b dividing

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.

No map. ie where is the map as this question cannot he answered without a map so the question as is is irrelevant and i am disappointed as i am a geologist.