Q: Was the Carnation Revolution the deadliest revolution in Europe?
A: The Carnation Revolution was initially a 25 April 1974 military coup in Lisbon which overthrew the authoritarian Estado Novo regime. Its name arose from the fact that almost no shots were fired, and Celeste Caeiro offered carnations to the soldiers when the population took to the streets to celebrate the end of the dictatorship; other demonstrators followed suit, and carnations were placed in the muzzles of guns and on the soldiers' uniforms. Portugal is a country located mostly on the Iberian Peninsula, in southwestern Europe.
The answer is no.

Q: Would a cattle farmer be useful to a drum maker?
A: Cattle are often slaughtered for meat and other products, like leather. Drums are often made with leather.
The answer is yes.

Q: For Hostas to look their best, do they need lots of chlorophyll?
A: Hostas are characterized by large green striped leaves. The green color in plants is attributed to chlorophyll.
The answer is yes.

Q: Did the Pearl Harbor attack occur during autumn?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Autumn runs from about September 20 to about December 20. Pearl Harbor was attacked on December 7, 1941.
The answer is yes.