The delivery of first-class mail by the u. s. postal service is an example of:
a. perfect competition because consumers have access to other methods of written communication; for example, email and text messaging.
b. monopolistic competition, because mail delivery is a differentiated product provided by many firms.
c. a monopoly.
d. an oligopoly because a few other firms provide delivery of letters and packages."

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answer: musical connotation

leonard b. meyer (1918-2007) was an american composer, author and philosopher. his work emotion and meaning in music is perhaps the first major treatise on music. it is a philosophical and psychological work, greatly influenced by koffka (one of the major proponents of gestalt psychology). his work deals with the problem of musical meaning and musical communication.

the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.