What does Lexicology, a branch of linguistics study?

Tests on English Lexicology

What does Lexicology, a branch of linguistics study? It is the study of words. It is the study of sentences. It is the study of definitions It is the study of aspects.

What is the smallest meaningful unit of speech? The smallest meaningful unit of speech is a morpheme. The smallest meaningful unit of speech is a word. The smallest meaningful unit of speech is a sound. The smallest meaningful unit of speech is a root.

Which words do we call homonyms? Homonyms are the words which are identical in sound and spelling. Homonyms are words which are identical in writing. Homonyms are the words which are identical in pronunciation. Homonyms are the words which are identical in speaking.

What is the common word for such terms as "set expressions, fixed word- groups, set phrases"? Phraseological unit. Unit. Set word-group. Phrase group.