Please explain, in general, the purpose of an Entity Relationship Diagram (ERD) to a person with no knowledge on such topic.

In the film "epic 2015," epic is the name for:

To become an audio technician, the most successful tactics might include the following. (select all that apply). learning how to persuade other people gaining different types of experience in audio technology learning as much as possible about art history establishing a reputation as a reliable professional

According to the video what are some tasks petroleum engineers perform check all that apply