Some people think that using animals for experimentation purpose is cruel, but others believe that it is necessary for the development of science. Discuss both views and give your opinion.

The necessity of animal testing has become a controversy during last few years. The advocates of this notion tend to say that, it is a crusial experiment to ensure the safety of drugs for humanbeigs; while the opponents believe that it has an ethical problems and there is no garantee for safety of those medications […]