Question

which planet is known for its planetwide scarps? mercury venus earth mars

Explanation:

Mercury has planet - wide scarps. These scarps are long cliffs formed due to the contraction of Mercury's core as it cooled over time. The other planets (Venus, Earth, Mars) do not have such prominent planet - wide scarps. Venus has a thick atmosphere and volcanic features, Earth has diverse geological features like plate tectonics, and Mars has features like volcanoes and canyons but not the same kind of planet - wide scarps as Mercury.

Answer:

Mercury