These featured include migration of people, invasions, population distribution, and De-urbanization
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If you have just one crop, what happens if you have drought? or too much rain? You might not have any crops then and you won't make enough money to support you family.
Answer:
It increased it's population
Explanation:
There are two types of sources; Secondary and Primary.
Primary sources are sources from directly from the time period, such as diaries, film footage, artifacts, and more!
Secondary sources are sources that use primary sources to analyze the time period, such as biographies, textbooks, history books, and encyclopedias.
But remember, we should never trust everything we read. Always ask questions! The author could have left out some other details we may never know. It's your decision on how you use the information to affect your work.