It shows the level of familiarity with the media being manipulated.*1 pointa. Productionb. Techniquesc. Mediumd. Forms

The question seems to be asking which term refers to the level of familiarity with the media being manipulated.

Here are the definitions of each term to help you decide:

a. Production: This refers to the process of creating or manufacturing a product. In the context of media, it could refer to the process of creating a film, a piece of music, a book, etc.

b. Techniques: These are the methods or ways of doing something. In the context of media, it could refer to the methods used to create a piece of media, such as the techniques used in filming, editing, writing, etc.

c. Medium: This is the material or form used by an artist to create his or her work. In the context of media, it could refer to film, music, books, etc.

d. Forms: These are the different types or styles of something. In the context of media, it could refer to different types of film, music, books, etc.

Based on these definitions, the term that best fits the description given in the question is "c. Medium". This is because the medium is what is being manipulated in the creation of a piece of media, and a person's level of familiarity with the medium would affect their ability to manipulate it effectively.