The discovery of beer can be rooted from the discovery of biological science in the attempt to alleviate food consumption. In this respect, civilizations were alleviated through the importance of sanitation, pasteurization, and the development of other forms of food through different bacteria.
Answer:
false
Explanation:
it is one of his role as a president
I believe the answer is theoretical model
A theoretical model is the foundation that could be held to support a certain theory for a certain research or study.
From the example above, the study is build on a foundation that both behavior and environmental factor could affect the subjects' overall health
The only change I know of was the silk road, where they had to build roads and clear forests so that traders could go through. I don't think any other geography changed during that era.