D. ancient seas because sedimentary rocks form when there is alot of pressure.
Phone, Money, Transportation....
Answer:
D
Explanation:
In the introduction, you introduce the thesis, so the reader will understand what the essay is about.
In the conclusion, you restate the thesis to remind the reader of the thesis you just provided evidence for.
Answer: It was used by transmitting electrical signals over a wire laid between stations.
Explanation:
