Answer:
B) An oceanic plate goes under a continental plate.
Explanation:
All of these are technically not the correct answer, the real answer would be something on the lines of: "An old dense plate pushes a lighter weight plate causing an ocean trench." But since that isn't an option, the best one would be an oceanic plate that goes under a continental plate.
They're covered by sedimentary rock .
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What do want to talk about hmm??
True. Smog is fog combined with other pollutants like smoke than can be from automobiles or cars.
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