The Indus river valley had kiln-baked bricks, while the Mesopotamians sun baked their bricks. Which method was more effective, and why? plzzz help

Why hadn’t europeans used maritime routes before the age of exploration?

The crittenden compromise which option explains the role that this legislation played in the buildup to the civil war? it attempted to resolve the complications introduced by the missouri compromise; this to stave off the civil war. it sought to encourage southern diplomats to take their seats in congress so their voices could be heard in government. it proposed six amendments to the constitution aimed at protecting slavery; however, its passage was blocked by congress. it attempted to establish stipulations that made secession from the united states constitutionally legal.

Which statement best describes a major advantage of a confederal system of government over a unitary system