Mohamed Aziz A.

The guitar is a string instrument of the chordophone family constructed from wood and strung with either nylon or steel strings. wikipedia.org

Audio post production is the general term for all stages of production happening between the actual recording in a studio and the completion of a master recording. It involves, sound design, sound editing, audio mixing, and the addition of effects. wikipedia.org

A record producer is an individual working within the music industry, whose job is to oversee and manage the recording (i.e. "production") of an artist's music.

An arrangement of a musical composition is a reworking of a piece of music so that it can be played by a different instrument or combination of instruments from the original. wikipedia.org

A film score (also sometimes called background score, background music, movie soundtrack, film music or incidental music) is original music written specifically to accompany a film.