In a water treatment plant, bacteria are used to digest material in the water. however, these bacteria can be harmful to humans. because of this, what other steps must be taken in the treatment of water? . a. treated water must be moved long distances before being dumped in the ocean.. b. water must be dumped in the ocean so humans do not accidentally drink it.. c. chemicals must be added to kill the bacteria after they have finished digesting.. d. the water that contains bacteria must be disposed of so humans do not drink it..

C.Chemicals must be added to kill the bacteria after they have finished digesting..

Explanation:

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.