Answer:
because it was the main thing back then that was most valuable other than gold iron and steel was used for almost everything and you could sell or trade it when needed for money or other sources
Energy and matter is converted through the food chain either when something is eaten or it dies naturally. Decompress then break down the dead organisms and release them back into the environment
The structure and function of human body systems.
I believe the correct answer is "They traveled on foot while hauling their belongings"
I hope this helps and I'm sorry for any inconveniences
Good luck :)
