This document discusses the levels of linguistic analysis, including phonology, phonetics, morphology, and word structure. It provides definitions and examples for each level. Specifically, it notes that phonology analyzes patterns of phonemes, the smallest units of sound, and how they combine to form words according to rules of the language. It gives examples of phonemes and allophones in English. Additionally, it defines morphology as the study of word structure, including free and bound morphemes like prefixes, suffixes, and roots.