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Colloquial English is educated, but still not stuffy sounding. Colloquial is more formal than the way of speaking we would use to talk to our best friend, and doesn't include a lot of slang.
Formal English is both educated as well as stuck up. No one would use this form of speaking while talking, however it is often written. Despite being often written, this form of language is not as poular for witing as it was in the past. Formal English shall never contain slang.
Bivalves, compressed bodies enclosed by a shell consisting of two hinged parts. Bivalves include clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater.
Personal feelings and a first-person point of view are twi characteristics of an autobiography, a self-written account of the life of oneself. :)