This water pollution comes from discrete locations, e. g., you could point at a pipe discharging a dark fluid into a river. A

Cultural eutrophication

B

Red tide

C

Nonpoint-source pollution

D

Point-source pollution

E

Algal bloom

To test the responsiveness of the kidneys, scientists have designed an experiment tracking urine output of people during a normal day, while regulating the in-take of water by mouth. what would be an appropriate hypothesis for this experiment?