Which house holds the final step in an impeachment process ?

Senate

Explanation:

The Constitution requires a two-thirds vote of the Senate to convict, and the penalty for an impeached official upon conviction is removal from office. In some cases, the Senate has also disqualified such officials from holding public offices in the future. There is no appeal. (from senate.gov)

southerners, for their part, considered brown a terrorist. they felt threatened by northerners' deification of brown and worried about the potential for other, similar armed insurrections.

explanation:

a.) are both appointed for life