D. rift valleys.
Trenches occur at convergent oceanic plates; fossils are extremely old bones, bodies, or footprints, which have gotten so old the intervening years have turned them into rock; U-shaped valleys are valleys which are shaped like the letter U, and are usually formed by glaciers, which tend not to occur underwater very often.
Correct answer is option C.
I think it's the techtonic plates.
The high pressure in the Great Basin forces it way toward the lower pressure on the coast usually during the winter months. As the air sinks, it heats up, loses moisture, and increases in speed as it forces its way through the canyons. So, hot intense winds are the result. This also contributes to the forest fires in the area.
Answer:
Explanation:
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