Question

fishes in rivers are at danger

Answer 1

its because the rivers are getting polluted and impure.......this decreases the amount of dissolved oxygen in water.....as it gets decreases its getting hard for them........not only that but the little pure water is also taken away from them............

Answer 2

FISHES IN THE RIVER ARE AT DANGER BECAUSE NOW A DAYS THE RIVER IS GETTING POLLUTED WHICH IS NOT GOOD THE DO NOT GET THE PURE OXYGEN.