#1 best categorizes “interaction between humans and the environment”.
Answer:
C and E
Explanation:
C is one of the central ideas, because the passage begins by describing the issues that were occurring in China beforehand, and the growing tension among the citizens. E is also one of the central ideas, because the government managed to disrupt the protests by violently massacring and arresting the protesters who they believed to be a threat to their regime.
Hope this helps!
Answer with Explanation:
Transportation innovation greatly contributed to the <em>American national unity </em>by uniting the nations that were growing during those times. It provided an ease when it comes to <u>trading </u>because goods from the different cities and towns were travelled/transported through newly built<em> transportations.</em>
An example of this is the "steamboat" which was first used in the<em> Hudson River </em><em>(1807). </em>This hastened the trading which navigated the rivers, thereby <em>lessening the cost.</em>
Another example is the "steam railroads"<em> (1830). </em>These didn't only helped with the trading but also started carrying passengers who wanted to travel from one place to another. They successfully<u> replaced the use of horses.</u>
Such transportations grew and connected the whole country, especially in terms of <em>economy, culture and politics.</em>