Answer and explanation

Correct answer: D. Lava erupts under water and cools into rounded shapes

  1. Step 1: They are seen in the foothills of the Troodos. Step 2. The pillow shapes show that the lava erupted on an ancient sea floor. Answer: Lava erupts under water and cools into rounded shapes. Why not the others: They do not form over snow or in a desert, and they are not dust.

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