Because it’s an important perk of history ty
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.
Renewable energy sources are important in Eastern Europe because they allow sustainable development.
Hey there!
The Battle Of Marathon was an intense battle of the Greco-Persian wars that was about sacrifice and never giving up.
The Greeks, as always, had a smart plan. They fought on a thin, hard to fit through mountain pass and they used phalanxes and defeated the Persian Hoplites and Immortals. They thought they had victory, but eventually, the way around the pass was given to King Xerxes of Persia by a Greek traitor and the Persians one.
B. he wrote the treaty of Versailles after world war l<span />
