Answer:
1. Courtesy.
2. Manners.
3. Clarity.
4. Purpose.
Step-by-step explanation:
1. Courtesy: Dennis uses a polite tone and always makes a request instead of a demand. Courtesy is an act of acting politely and an expression of humility.
2. Manners: Renata takes care to use the right volume, rate and tone of voice when speaking. Manners describes the way an individual performs an action such as form, method, style etc.
3. Clarity: Felicity speaks clearly and deliberately so that everyone can follow what she says. Clarity entails being clear, vocal and eloquent while talking.
4. Purpose: Mateo introduces himself first, and then explains why he's making the call. Purpose describes the reason or intent for performing an action.