When sending a non-audience specific message to a large group of people, you are engaging in which type of communication?

Public communication

Explanation:

Public communication tend to happen when an individual or groups are meant to commission in dialogue or debate in the public surroundings or sphere, that is there to provide a message to a particular audience. Events such as public speaking, billboard advertisements and  newspaper editorials are considered to be few forms of this type of communication.

i bought a new phone

explanation:

i will send you the money when i get back from lunch