The statement "Models make it easier to visualize and understand difficult concepts" is True.
The statement "Models show a complete representation of every detail in a cycle" is False. Models often simplify complex systems and do not include every detail.
The statement "Models may help generate questions or predictions" is True.
The statement "Models can help communicate ideas" is True.
So overall, the helpfulness of models such as the Carbon Model lies in their ability to simplify, generate questions, and facilitate communication.