Animal testing is the use of non-human animals in experiments to assess the safety and effectiveness of products, such as medicines and cosmetics. Researchers often use animals like mice, rats, and rabbits because their biological systems can be similar to those of humans, allowing scientists to study how substances affect living organisms. The practice aims to gather data that can help ensure human safety before products are released to the market. While animal testing has contributed to many medical advancements, it also raises ethical concerns regarding the treatment and welfare of the animals involved in these experiments.