Answer:
C) the level of their density.
Step-by-step explanation:
Gaseous planets (gas giants) are huge planets made up of large volumes of gaseous materials, with this characteristic we have in the solar system: Jupiter, Saturn, Uranus and Neptune. The terrestrial planets, in turn, are those formed mainly by rocks and metals, have a solid surface without the incidence of rings, as is the case with Mercury, Venus, Earth and Mars.
Although they may differ in several characteristics, the main difference between these two types of planet is the levels of density. Gaseous planets tend to have the lowest density, while terrestrial palettes are denser.