Answer:
I would say this is niche partitioning.
Explanation:
Every organism has a certain range of requirements called a niche. The competitive exclusion principle states that two organisms cannot occupy the exact same niche without one out-competing the other. Niche partitioning is basically changing some aspects of a niche so that there is no need for competition.
A. True because they are more likely to be voted as leaders.
Explanation:
The most destructive disease brought by Europeans was smallpox. The first well-documented smallpox epidemic happened in 1518. The Lakota Indians called the disease the running face sickness. Smallpox was lethal to many Native Americans, bringing sweeping epidemics and affecting the same tribes repeatedly.
You have not showed any timeline to get the information from?