The Physcial feature of the earth are naturally created feature of the earth ranging from different landforms to ecosystem. Human are resident in the earth and are therefore bound by this feature and most times influencing our decisions day in day out. The kind of job we chose to settle for can be influenced if it's accessible and also in a serene environment, we wouldn't take up jobs in environment desirable enough, also we chose our means of travel based on the physical feature present in that location, in a location with a whole lot of valleys and mountain and one is to travel across location, road transport becomes the least option to consider with air transport becoming the best option.
Finally, the way we spend our free time is also influenced by physical features near us, i'm more likely to go to a beach near me more than a mountain that is some far away kilometers from me.
Explanation: The answer is C because all of the revolutions that you said, the people all wanted a change in government, but the government is resistant to change and they quell rebellions of people who oppose them.
The answer is never because GDP per capita depends on GDP and population. Countries with more people have the potential to make more goods and services. But, having more people also lowers GDP per capita, because more people have to share these products.