Answer:
vaccination
Explanation:
Louis Pasteur had been working to find a vaccine that would cure cholera in chickens. His lab assistant gave an older, weaker strain of the disease to the birds. When these birds did not die Pasteur began to rethink his ideas a came up with our current method of administering vaccinations.
Answer:
WW1, Roaring Twenties, Dust Bowl, WW2, Cold War
Explanation:
3 is A; no taxation without representation
4 is C; France and Britain were at war a lot so since the colonies didn’t help directly they wanted them to help by funding
There are no answer behind the question you had sent sir/ma'am
