Answer :
Answer:
The correct option is A. The Population will decline over time
Explanation:
As the phytoplanktons won't receive enough sunlight, they will not be able to make enough food by photosynthesis. As a result, the phytoplanktons will start to die and they won't be able to reproduce abundantly like before. Hence, the population will decline.
Other options like option B are false because the population will not decrease their need for food. They will start to die due to lack of food and sunlight.