C and D are the best answers out of the bunch
<span>World War I became a global conflict for several reasons. One reason was that many countries around the war were involved in some way with the war. The alliance system helped spread the war quickly. The two main alliances during the war were the Allied Powers and the Central Powers. While the emphasis is given to the main powers in each alliance, there were smaller countries allied with each side.
hope this helps!</span>
<u>Answer:</u>
Immigrants helped US to become what it is today by promoting and enhancing the culture and economy.
<u>Explanation:</u>
- United States is the only country that has the highest number of immigrants. The largest immigrants entering into US are from Mexico.
- So, the main reason for US to have the maximum development as it has today is due to the diverse population.
- These immigrants help in promoting the ideas, culture, and trades to uplift the economic and result is the development we can see today.
Answer: D. Humans cultivated plants and domesticated animals.
Explanation:
The first agricultural revolution took place in prehistoric times, more precisely in the Neolithic period. The man led a nomadic lifestyle before that period; he was constantly on the move because of food search. In the Neolithic, man domesticated the first plant and animal species. The pig and the dog were the first animals, and the cereals the first plants. This encouraged man to form an evening of social community and form permanent settlements because he has had a secure food source ever since.
