Answer: Arctic Ocean
Explanation:
Because the Arctic Ocean is colder it is more dense
Emigrated means they exited so due to the high amounts of pollution all the animals left which cause a population decrease
Organ systems is the answer
Answer:
As the water table goes low, water may not be easily obtained leading to it scarcity. Overdrawal of water can also lead to sinking or lowering of the land surface that can make it prone to flooding. Streams and water bodies may also get disconnected due to over-withdrawal of water.
Birth and immigration
death and emigration