= Mantle
What is the temperature and density of the material between point a and y compared to x and c

The answer is c) people evacuated but almost all returned

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.

There are no put the options so we can assist you ! put it on then i'll answer it ! did you not put the options on intentionally by any chance?

The answer is a for sure