Textbooks often say the Panthers were violent and anti-white. For example, the Teacher Curriculum Institute's "History Alive! The United States" reads, "Black Power groups formed that embraced militant strategies and the use of violence. Organizations such as the Black Panthers rejected all things white and talked of building a separate black nation." In reality, the Panthers believed in using violence only in self-defense. This passage also tries to separate the Panthers from "nonviolent" civil rights groups. The Panthers didn't begin out of thin air, however, but developed from their relationships with other civil rights organizations.
Summarize this passage into one sentence.

isaac newton first proposed that earth was not perfectly round. instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator.

the idea of the earth being a flat disc is also inconsistent with the fact that a given lunar eclipse is only visible from half of the earth at a time. the only shape that casts a round shadow no matter which direction it is pointed is a sphere, and the ancient greeks deduced that this must mean the earth is spherical.

all choices are correct

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.

hope this .

plz give me brainliest!