Is a process whereby a minority group gradually gives up its own culture and adopts the culture of a majority group

assimilation

Explanation:

Assimilation, in anthropology and sociology, the process whereby individuals or groups of differing ethnic heritage are absorbed into the dominant culture of a society.

whose power in the senate is equal to the power of the speaker of the house?

according to worldatlas.com, the u.s. has an 86% literacy rate.