Answer:
Undergrowth of water plants hypoxia
Low levels of oxygen.
Explanation:
Eutrophication occur when lake or river has adequate nutrients that will encourage the growth of water plants i.e algae which lead to the depletion of dissolved oxygen in the lake. The growth of algae is increased due to availability of carbondioxide or phosphorus or nutrients required for photosynthesis. This result in tainted drinking water,hypoxia and degradation of recreational activities.
A site where pathogens can survive , multiply and serve as a continual source of infection is called the reservoir. It is site where the infectious agent survives.
Reservoir is a host which allows the pathogen to live, and possibly grow and multiply. Humans , animals and environment can be reservior for microorganisms. Principal habitat that which pathogen lives , flourishes and able to multiply.
There are some examples such as humans are the reservior for the measles virus because it does not infect the other organisms. The place where microorganism, resides, thrives and reproduces. A carrier is a person with in-apparent infection who are capable of transmitting the pathogen to others.
To learn more about the Reservoir here
brainly.com/question/18509745
#SPJ4
I would say a lot of energy
During the Quaternary Glaciation, ice sheets expanded, notably from out of Antarctica and Greenland.
The answer is D. -Antarctica
