Answer:
Nomads and town dwellers traded with one another to meet their needs.
Step-by-step explanation:
A nomad is a term used to describe people who do not have a particular home but rather move from place to place.
Town dwellers are people that have a home and dwell there, having children and developing their community.
The statement that best explains the importance of trade to both Nomads and town dwellers are that they both need each other to survive, so they trade together.