Kendra is very polite to her teacher and her mother. when she speaks to her younger brother, she tends to be rude and condescending. she is much nicer to him when her mother and father are present than when they are alone. kendra understands:

Kendra understands Pragmatism.

Explanation:

Pragmatism is a philosophical doctrine whose fundamental thesis is that our idea of an object is nothing more than the sum of the ideas of all the imaginary effects attributed by us to that object, which has now had a practical effect.

In this regard, Kendra attributed that respectful treatment should only be established with older people who have some authority over her, such as her teacher and her parents. However, Kendra did not attribute this behavior to younger people who do not exercise authority over her, such as her brother, and so often behaves rudely with him.