The phrase that refers to the principles through which a critic evaluates, analyzes, or interprets a piece of literature is literary criticism
Explanation:
The definition of LIterary criticism is the study, evaluation, and interpretation of literature, then all the actions of critic in order to stand the quality of a piece of written work are included in this definition, the process of evaluation, analysis, and critic of a piece of work is focused in the purpose of the work and its techniques.