Why did early humans paint on cave walls?

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

Who were the sons of liberty? a. colonists who wanted a monopoly on the british tea trade. b. colonial anti-british protestors c. colonists who wanted seats in the british parliament. d. colonists who wanted to block all colonial trade with britain. !

Conflict resolution can be difficult. which of these is the best example of how the us congress resolves conflict instead of always using a majority vote?