According to federalist #51, why do we have checks and balances in the first place?

Which best explains how wealthy residents of italian cities contributed to the renaissance? a) wealthy residents bought works of art, which supported artists. b) wealthy residents participated in religion, which supported the church c) wealthy residents participated in music, which supported the arts. d) wealthy residents bought classical books, which supported scholars.

Plz how did the jews of the diaspora preserve their heritage?

How did the results of wwi benefit the u.s.?