reaction
A reaction is a response to a stimulus or an event. In science, it often refers to a chemical reaction, where substances interact to form new products. This process can involve changes in energy, color, or state, and is fundamental in fields like chemistry and biology.
In everyday life, reactions can also describe emotional or physical responses to situations. For example, when someone hears surprising news, their reaction might be shock or excitement. Understanding reactions helps us comprehend both scientific processes and human behavior, making it a key concept in various disciplines, including psychology and sociology.