I would think its the curves demand
I believe the answer is: Canoe
Until the development of ships in mid 1800s, Canoes were the main method of transportation for those who want to pass watery region ( Rivers or lake)
In current years the usage of canoe is is restricted to sports (it's included in olympic) or for tourism purposes.
In Yellowstone the Pike fish were eating all of the trout causing the bear to eat the deer causing the wolves to not have food and therefor throwing the whole ecosystem out of balance
Giving different branches different powers
Answer:
<u>Reference group.</u>
Explanation:
A reference is something to follow, is serves as a guide, or to look up on. Humans depend and need social reference in order to act. A reference group would be a group by which characteritics would most definelty serve as an example on how to act or behave.
A reference group is found around a person's environment, it is made of people that are close to a person's life and are part of it.