The Seneca Falls Convention of 1848 was unique because it was the first time women were activists.
organized women to fight for their rights.
started the first social protest movement.
was open only to female participants. Members of the common school movement believed that

ORGANIZED WOMEN TO FIGHT FOR THEIR RIGHTS

Women were already activists, it didn't start the first protest movement, and it wasn't open to only females

Explanation:

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.