Archaeologists and anthropologists study about prehistoric peoples by looking for patterns in the artifacts.
Step-by-step explanation:
The archaeologists and the anthropologist study about the prehistoric communities with the help of the patterns of the artifacts that the people in that community used to use.
This gave them hints about the life styles that the people had in the past. The artifacts included things like clothes, food which the people of that community used in their day to day lives. This spoke a lot about the habits and the life styles of the people.