Which two groups engaged in symbolic burning as part of their social activism?

Draft resisters and radical feminists.

Explanation:

The Draft resisters symbolically burned their draft cards in order to protest the involvement of the U.S. in the Vietnam War. Although it was protected by the first amendment in the United States as a form of free speech, burning draft cards was considered illegal in Australia, where a similar protest also occurred.

Another known symbolic burning was that of the feminists who burned their bras. In the 60s, women began to fight for equal rights because they were seen as mothers, housewives or soon to be one of the two only. In 1968, women protested against Miss America for perpetuating "patriarchal and racist beauty standards". Some women burned magazines like cosmo and playboys as well as some bras during the protest that was quickly ended by law enforcer for safety issues (because things were being set ablaze on the streets). This was reported as a feminist protest with many bras being burned, which was not the case, but is believed to be true until this day.

explanation:

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explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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