Final answer:
Prosody is the language structure that encompasses rhythm and emphasis in communication. It refers to the patterns of stress and intonation used in speech.
Step-by-step explanation:
Prosody is the language structure that encompasses rhythm and emphasis in communication. It refers to the patterns of stress and intonation used in speech. Rhythm in language is achieved through syllabic emphasis, such as meter, and it helps create various effects in speech and poetry. For example, in a nursery rhyme like 'JACK and JILL went UP the HILL,' the stressed words have a regular and pronounced rhythm.