Final answer:
Scientific models are used for a variety of purposes, but they cannot be used to b. study obsolete systems.
Step-by-step explanation:
A scientific model is a simplified representation of a real-world phenomenon designed to explain, predict, or understand complex systems. Models can be physical, conceptual, or mathematical and aid scientists in making predictions and testing hypotheses to gain insights into natural processes.
Models are useful for studying complex systems or systems that humans cannot observe directly. They can help explain observed phenomena and make useful predictions. One possible use for a scientific model is to study of obsolete systems. By creating a model of an obsolete system, scientists can still investigate its behavior and learn from it. So, option b is not a possible use for a scientific model.