The answer would be "People".
The answer is airplanes.
They were originally used for reconnaissance but when they outfitted
with machine guns, they were given a more important role of attacking enemy
fortifications. Apart from machine guns,
they also employed bombs that were dropped on enemy trenches.
<em>Answer:</em>
<em>There were New theories reflected changes that were happening in society at large.</em>
<em>Explanation:</em>
<em>New theories about science reflected changes that were happening in society at large. Science focused on how to better society and build it up. Strives were made in protection of countries including better weapons seen in World War II.</em>
The correct answer to this open question is the following.
Although you did not attach options for this question we can comment on the following.
The consequences of political and nationalistic revolutions were the following.
These armed movements started when people got tired of the tyrannic ways of their kings and the excessively luxurious ways the monarchs lived in when poor people and peasants were hungry and dying of starvation.
Another important factor was a sense of nationalism and the love for their nation, repelling external influences that did not fit well in a determined culture. Some countries did not want to be unified with other countries. This factor created many ethnic differences and struggles. Finally, another important reason was liberal ideas that started to be considered by political leaders that harangued people with ideas of liberty and sovereignty.
The best example to support these concepts is the European Revolutions of 1848.
