Formal should be the answer. It seems most appropriate.
The influenza pandemic.
The influenza pandemic from 1918 - 1920 affected hundreds of millions of people across the world, and while nobody knows the exact death toll, estimates of the numbers killed generally range between 50 and 100 million — around four percent of the world’s population.
Answer:
united and work together as one like the English men
Explanation:
Miantonomo suggests that individual Native American tribes need to be "united and work together as one like the Englishmen," in order to continue to thrive as a people.
The reason is that, Miantonomo believed if the Native American tribes failed to unite as one, it would be easier for the Englishmen to destroy them or starve to death. Because all their environmental resources has been taken over and exploited by the Englishmen.
It may be because of environmental problems like droughts or cold weather. It could be because of poor farming. Religous problems or just econimic problems that led to people moving to find another place to stay.
a shortage of factory workers.