Question

question 3
why are models useful to scientists?
they allow scientists to measure very small things.
they help scientists stay safe during an experiment.
they always provide correct information.
they allow scientists to study very large, small or complex things.

Explanation:

Models are simplified representations. They help scientists understand and study phenomena that are too large, too small, or too complex to observe directly. They are not for measuring small things only, don't ensure safety during experiments, and don't always provide correct info as they are approximations.

Answer:

They allow scientists to study very large, small or complex things.