Final answer:
The subject of this question is Computers and Technology, and the grade level is High School.
Step-by-step explanation:
Coding is a common practice in the field of computers and technology. A coder is an important part of the process, as they are responsible for writing the code that makes programs and software function properly. However, the other options mentioned in the question, such as provider, computer, and insurance, are not directly related to coding or the process of writing code.