Less rainfall --> Water level drops + rivers slow more slowly --> Algae population increases
Amount of algae per unit of water increases when there is little rain
Conclusion: After a period of extreme drought, algae levels are low even in slow moving water.
Possible explanation: Algae require atleast some quantity of water to thrive.
(A) During periods of extreme drought, the populations of some of the species that feed on algae tend to fall. - Incorrect - Opposite. Does not help resolve
...
Amount of algae per unit of water increases when there is little rain
Conclusion: After a period of extreme drought, algae levels are low even in slow moving water.
Possible explanation: Algae require atleast some quantity of water to thrive.
(A) During periods of extreme drought, the populations of some of the species that feed on algae tend to fall. - Incorrect - Opposite. Does not help resolve
...
