Answer:
Sandro Botticelli painted Allegory of Spring
We would die because the other gases in the air, such as nitrogen, dilute it and make it safe to breathe
Charlemagne advanced education by establishing schools and promoting literacy.
I think the navy was instrumental in the Roman conquest of the Mediterranean basin. The navy was also a key in defending against barbarian invasions.
Didn't you already ask it? lol. France XD