Question

five - year - old donna uses shorter, simpler sentences when talking to her baby brother. she speaks in a very informal way with her friends, and she uses a more formal language with her fathers friends. donna is demonstrating her grasp of
multiple choice
morphology.
phonology.
syntax.
pragmatics.

Explanation:

Pragmatics is the study of how context affects meaning. Donna adjusts her language (sentence - length and formality) based on the social context (the person she is talking to), which is an example of pragmatic understanding. Morphology deals with word - formation, phonology with sound systems, and syntax with sentence structure. None of these other concepts are demonstrated here as directly as pragmatics.

Answer:

pragmatics