Answer:
the u.s. navigation signal timing and rang, and (navstar) GPS
Answer:
They usually have steep, sloping sides and sharp or rounded ridges, and a high point, called a peak or summit.peak — the pointed top of a mountain; a mountain with a pointed top. summit — the highest point of something, especially the top of a mountain.
Explanation:
Answer: B
Explanation: I think this is the correct answer
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Answer: abrasion
Explanation:
A stream carrying sediment flows over the solid rock of its channel, polishing the rock and wearing it away. This is an example of abrasion.