Answer:
Railroads improved the movement of people from one area to the other
Observation balloons gathered information about the enemy and communicated it back to the officers
Explanation:
i took the test.
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be the rise of the "proletariat," since Marx and his peers were highly against the consolidation of private wealth. </span></span>
Hey there!
When Columbia re-entered the Earth, the hot gases in the atmosphere (atmospheric gases), they destroyed the wings and it ultimately was destroyed. That technically means that the spacecraft wasn't shielded correctly, and led to a tragedy as well as major rethinking and reform for NASA.
That's why today, you see that all spacecraft are carefully tested and monitored before put into orbit.
Hope this helps!
He was the leader of Cuba's communist revolution
