1 Photosynthesis is an example of what?
A
one of philosophy's big ideas
B
one of Earth's key processes
С
one of humankind's best inventions
D
one of science's most well-known innovations

Answer is B

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B. One of Earths key processes

Explanation:

Photosynthesis is a process that keep oxygen in the air, keeps plants alive. It's vital both for humans and for the earth.

because of all the immigration, america became one big melting pot. the diversity of cultures from all over the world made america somewhat divided as well. people that immigrated stayed with their kind, and their traditions, while native born americans stayed with their kind and their traditions. normally, people born in american scorned the immigrants as well. the new religions also divided america. in summary, it took away from the american culture and identified america as the "melting pot."