Answer:
revolution is the movement of an object around of center or another object ,forceful overthrow of government by people or any sudden or grand change.
Alfred Wegener argued about the idea of continental drift in the early period of the 20th Century.
<h3>Who was Alfred Wegener?</h3>
Alfred Wegener was the geologist who discovered the theory of continental drift which had occurred on Earth about three hundred million years back.
Alfred Wegener identified that there was a supercontinent named Pangaea which was split and moved from its places being one of the similarities between the coastlines of the western part of Africa and the eastern part of South America.
Therefore, continental drift was one of the concepts beings argued by Alfred Wegener in the twentieth century.
Learn more about the Alfred Wegener in the related link:
brainly.com/question/798637
#SPJ1
It is an island, meaning it is surrounded by water on all sides, unlike countries on the mainland of Europe.
The soil is beaned down on by the sun not good for cropps
The correct answer is D, because "their" signifie that they are having "their" conversation, and that they own the conversation. C is incorrect because "there" describes where, B is incorrect because "they" describe who, and A is incorrect because "they are" doesn't grammatically or sensibly fit in, so the answer is D.