Question

if astronomers discovered a new inner planet in the solar system, which characteristic would it most likely have?
large size
gaseous composition
many moons
fast revolution

Explanation:

Inner planets (Mercury, Venus, Earth, Mars) are closer to the Sun, so they have shorter orbital paths and thus faster revolutions compared to outer planets. They are small, rocky (not large - sized or gaseous), and have few or no moons.

Answer:

fast revolution