A scientist is a person that studies and explores the physical and the natural sciences. The model will help the scientist comprehend the theory that cannot be observed. Thus, option A is correct.
What is a theory?
A theory is a tested and corroborated aspect of the natural and the universal world using the evaluation and estimation based on their observations.
They explain the facts and information that cannot be easily observed but can be proven by empirical methods. It explains the phenomena in a very well-mannered and is easy to understand.
The model of the universe will allow the scientist to understand the role and functions of the planets, sun, asteroids, satellites, etc., that cannot be observed directly.
Therefore, the theory allows understanding.
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