Final answer:
The correct answer to the question is D) Models allow many systems to be studied more than before there were models, as they offer a simplified way to simulate and understand complex systems.
Step-by-step explanation:
When considering which is true about what models allow us to do to the system being studied, the correct answer is D) Models allow many systems to be studied more than before there were models.
Models are simplified representations of the real world that allow scientists to study complex systems more effectively. By using models, scientists can gain insights and make predictions that would be difficult, impractical, or even impossible to obtain through direct observation or experimentation with the actual system. This is particularly valuable in fields like ecology, where the complexity and interconnectivity of systems make direct study challenging. It’s important to note that while models can simplify the process of studying systems and can provide accurate predictions, they are also subject to inaccuracies and require careful validation against real-world data.