Q: What kind of tool, often based on mathematical equations or computer simulations, helps us understand complex systems?


Read this paragraph and choose the correct option from the provided answers:

Food Chains. These two food chains represent complex systems in nature. They make the systems easier to understand. These are simple conceptual models. Models of very complex systems are often based on mathematical equations or computer simulations.

 Choices:

- levels

- planes

- panels

- models


A:
models