Who built the pyramids in ancient egypt?

Mostly workers, they would work for 3 months and then have 3 months off I believe (might not be correct). I do not think that it was slaves, just lower class workers. I learned this 6 years ago so this might not be correct!

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity