Which can be concluded from the order of various types of fossils found in various rock layers?
a.
rates of volcanism
b.
relative ages of the layers
c.
rates of erosion
d.
rates of deposition of the layers

How did the american revolutionary war change how some americans viewed the enslavement of african americans?

Why are nation-states difficult to create?

Plz which of the following statements about life in europe during the middle ages is not accurate. a. by the middle ages the only unifying factor in europe was christianity. b. most people lived in rural areas and worked on farms. c. priest, monks and church officials were virtually the only people in europe who could read and write d. most people lived in cities or towns and worked as skilled artis most people lived in cities or towns and worked as skilled artisans.