Why were ironclads an improvement over wooden ships?

Plz ? ? 20 points for this question ! hhjc6

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.

What type of sentence has at least one independent and one dependent clause