Answer:
C. It is impossible to verify an experimental result without a control group.
Answer:
c
Explanation:
urbanisation played a HUGE factor
Answer: Peasants were the poorest people in the medieval era and lived primarily in the country or small villages. Serfs were the poorest of the peasant class, and were a type of slave. Lords owned the serfs who lived on their lands. In addition, serfs were expected to work the farms for the lord and pay rent.
An example of physiology is the study of the human body
