Why are chickens blue?

The answer is cave paintings

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.

The answer would be online media like a social media. it does refer to forms of different media content created publicly by the end users since 2005 and would cover how people use social media.hope this would be of .