Photographs help historians learn about the past by visualize the area or situation and the things present in that time.
<u>Explanation:</u>
With seeing the pictures of the time, the historians want to know about, they can learn about that time by seeing that area and the things which were used by the people of that area.
Photographs of an area help us to gain a deeper insight of that area and they are more useful to us when compared to reading texts about that time and area. They also helped us to learn about how people used to deal with the problems.
dessert mountains and massive valleys each was a factor in each of these country's and later on a "silk road" is what the trade route from china to India was later called hope this helps
A B D i think hope it helps
