Answer:
In Europe, the Crusades led to economic expansion; increased trade and use of money, which undermined serfdom and led to prosperity of northern Italian cities. They led to increased power of the monarchs, and, briefly, to increased power of the papacy.
I believe the answer is Observations.
Mayan civilizations made architectural designs to use time and days.
I hope this helps!
C. Relative Dating is your answer I think.
“Cottonwood” would be correct!! :D hope this helped!!
