Yes, back then thousands of years ago everyone traded to get what they are needed.
Answer:
You dont have the options up but here is one thing that was least likey environmental changes decreased the production of food.
Explanation:
Between 25 and 50 percent
Answer:
1)
1
3
7
2
4
5
6
2)
My most important choice is a fresh water sorce. It is my first choice because you need fesh water to live. My secound choice is mild climate. I picked mild climate because you need a good climate to plant and work. Third choice is fertile land. I picked that because you need fertile land to plant food and you need fertile land for that. My forth is near a river or ocean I picked that because a river or ocean is used for dirnking and a lot of other things. Fith is near a forest I picked that because a forest has plant you can use for medicine. My sixed choice is an area suitable for defense or spotting enemies I picked that because you need a spot to hide from your enemies so you wont get killed. Last is having friendly neighbors that is my last because you dont really need friendly neighbors but you do because if you enemies come you need to cooperate with them.
Explanation:
