4. What are some examples of trade between villages? How do historians know
about this trade?

Skilled villagers were able to trade their goods and services with other villages. ... Early villages developed temporary shelters to follow herds, competing with other villages for food.

Explanation: The interaction between villages and the trade between them not only helped economy development or cultural development but also scientifical and social development since by observing how other societies and tribes interacted and did things, they managed to chose the best way to do things and share new techonologies

answer; caravan;

stable food supply,social structure, government,religion,culture/art,technology and writing/language;