What legislation called for large areas of tribal land to be broken up into small plots that would be owned by individual native americans?

The Dawes Act of 1887.

Explanation:

The Dawes Act was named honoring Senator Henry L. Dawes of Massachusetts. It allowed the United States´ President to partition Native American tribal lands into lots meant to be own by Native American individuals. This was a way to coerce Native Americans into a capitalist proprietary bond unknown for them before. The act not only transferred traditional practices of land ownership into a governmental system of private property but also allowed some Native lands to be appropriated by white settlers.

b) brahmans   is nomadic society