The tree will not grow fertile
Saprophyte is the organism that obtains it’s energy from dead or decaying matter
The answer is Contour lines
The ring of fire in is the pacific rims region
There are limited amounts of resources in a general area. Some civilizations may not have the ability to produce resources that they need. That makes 2 routes:
1) cooperation: They can cooperate with another people group that lives in a different region and trade with them
2) conflict: They can attack/raid another people group in a different region for the resources
hope this helps