Answer:
Step-by-step explanation:
Scientists are working on new approaches that replace, reduce, and refine (improve) animal experiments. This is known as the 3Rs of scientific research. Some of this work focuses on improving the housing for the animals, while other work involves using cells in a test tube or computer models as animal substitutes. The three Rs are a step in the right direction for medical science. replacement, reduction, and refinement. Replacement is about finding different options for experiments, other than animals, and reduction is about developing methods so that fewer animals are needed in each experiment. Refinement is concerned with improving current animal research so that the animals suffer as little as possible.