Which field studies the stress and intonation in language?

Phonology is the field of linguistics that focuses specifically on the study of the sound systems of languages, including aspects such as stress and intonation. Stress refers to the emphasis placed on certain syllables within words or on certain words within sentences, which can significantly affect meaning and communication. Intonation refers to the variation in pitch while speaking, which can convey different emotions, attitudes, or types of sentences, such as questions versus statements.

In contrast, morphology examines the structure and formation of words, syntax deals with the arrangement of words to form sentences, and semantics concerns the meaning of words and phrases. These other fields do not focus on the auditory features of language like stress and intonation, making phonology the appropriate choice for the question.