Dynamics in music refers to the loudness or softness of a note, as well as the quality of the note is played.

The first part is perfect! Dynamics deal with your volume, however, they do not refer to the quality of the sound. The quality of the sound is known as tone.

The answer would be online media like a social media. it does refer to forms of different media content created publicly by the end users since 2005 and would cover how people use social media.hope this would be of .