Can someone help me out?

New tools and crops.

Explanation:

Cmon, it's the only positive thing in the list

New tools and crops. These were innovations that were a positive effect of the Columbian Exchange.

taking a bath requires the most water out of the given options because it takes a significant amount of water in order to fill a bathtub.

answer; a variety of simple organic compounds could be spontaneously synthesized from components in earths primitive atmosphere;