The rate of species extinction on earth is currently very high—-perhaps as high as it has been since the time of the dinosaur extinction. which of the following disruptions is not a major cause of this high extinction rate? Climate change
Acid rain
Earthquakes
Cosmic radiation

White flour this don't make sense

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.