which is one characteristic that mars and earth share?\n○ rings\n○ seasons\n○ few clouds\n○ active volcanoes

Brief Explanations:

Both Earth and Mars have seasons. Earth's seasons are due to its axial tilt and orbit around the Sun. Mars also has an axial tilt similar to Earth's, causing seasonal changes in its atmosphere and surface features. Earth has rings (atmospheric rings in a very different sense from planetary - ring systems like Saturn's, but not in the traditional ring - system sense), and Mars has no rings. Earth has a significant amount of cloud cover, and Mars has clouds but not "few" in a comparative sense. Earth has active volcanoes, while Mars has large extinct volcanoes.

Answer:

seasons