Concept:The planet nearest to the Sun is identified by the order of planets in the solar system.
Explanation:The eight planets are arranged by increasing distance from the Sun.
The correct order starts with Mercury, followed by Venus, Earth, and Mars.
Mercury has the smallest orbital path around the Sun.
It is also the smallest planet in the solar system, but the deciding fact here is its distance.
Among Earth, Mars, Mercury, and Venus, Mercury lies closest to the Sun.
Therefore, Mercury is the correct answer to this question.
Answer:C. Mercury