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Answer:
Dance is a performing art form consisting of purposefully selected sequences of human movement. This movement has aesthetic and symbolic value, and is acknowledged as dance by performers and observers within a particular culture.
False because that is an opinion.
There were actually several building techniques that were introduced by the Romans, but perhaps the most important was the bridge building technique that allowed bridges to be built without supports.
False. Romantic composers were notorious for using excessive amounts of dynamics! That's how they'd communicate their intentions to the performing musicians, by putting dynamics in the music so the musicians would know exactly what the composer wanted from them.