Answer:
First prompt seems easy.
Explanation:
The most important impact of the Columbian Exchange was the spread of different animals and vegetables.
Now, you can come up with the rest by researching about the Columbian Exchange if you don't know much about it, instead of asking for someone to do the whole document for you. I got you starting line, you're welcome :)
Answer:
A. Some rulers raised armies to conquer larger territories and defend their borders.
B. Rulers made laws for their subjects and set up courts to keep the laws.
D. Conquering rulers seized land from nobles and gave it to those who would swear allegiance to them as king.
During the twentieth century, the study of the large-scale structure of the universe evolved from the theoretical to the practical; the field of physical cosmology was made possible because of both Einstein's theory of relativity and the better ability to observe extremely distant astronomical objects. Option A is correct.
Albert Einstein formulated two theories which he included to his theory of relativity. On the one hand the special relativity and on the other hand, general relativity.
The former refers to the lack of gravity and the physical phenomena that occurs because of it and the latest refers to the law of gravitation.