Why do we need to classify organisms?

The classification of organisms is achieved in the branch of science called taxonomy. Classification is important  in order for future references and understanding of the common properties and characteristics of organisms for research and easy skimming of characteristics. This is for organization and convenience purposes

He should put sand around the spill in order to contain it so that it won't spread

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.