If you want to create a chart that contrasts the four outer planets. Which chart should he use?

To effectively contrast the four outer planets (Jupiter, Saturn, Uranus, and Neptune), a bar chart or a radar (spider) chart would be ideal. A bar chart allows for easy comparison of specific characteristics like size, mass, distance from the Sun, or number of moons. A radar chart can visually represent multiple attributes simultaneously, highlighting differences in their composition, atmosphere, and other features.