Which of the following is not a region in a lake ecosystem? multiple choice littoral zone epilimnion pelagic zone hypolimnion zone

Hypolimnion zone

Explanation:

The ecosystem of lake consists of four following zones :

1. Pelagic zone or limnetic zone  .

2. Benthic zone .

3. Littoral zone  .

4. Euphotic zone .

The ecosystem of the lake includes living organisms such as the animals , plants , micro organisms etc.  

Epilimnion is the top layer of a thermally stratified lake .

And the Euphotic zone lies almost in the Epilimnion.

Hence ,

Hypolimnion zone does not belong to region in a lake ecosystem .

d. stage 4

explanation:

the existence of some kind of demographic transition is widely accepted in the social sciences because of the well-established historical correlation linking dropping fertility to social and economic development.[1] scholars debate whether industrialization and higher incomes lead to lower population, or whether lower populations lead to industrialization and higher incomes. scholars also debate to what extent various proposed and sometimes inter-related factors such as higher per capita income,lower mortality, old-age security, and rise of demand for human capital are involved.[2]