Simulations are models or representations of real-world processes or systems that allow individuals to explore and analyze different scenarios without the risks or costs associated with actual events. They can be used in various fields, including education, engineering, and healthcare, to enhance understanding and decision-making. In a simulation, users can manipulate variables and observe outcomes, making it a valuable tool for training and experimentation. For example, flight simulators help pilots practice flying in a controlled environment, while computer simulations can model climate change effects, providing insights into potential future conditions.