organism

An organism is a living thing that grows and changes over time.

You hear this word often when talking about science and nature. For instance, scientists study different types of organisms to learn more about how they survive and adapt in their environments. In school biology class, you might explore the characteristics of simple organisms like plants or animals, while studying more complex ones, such as bacteria or fungi. Even in everyday conversations, people use the word "organism" when discussing healthy habits – for example, exercising regularly is good for your organism's overall well-being.