An explanation or comment to text is also known as a(n)

Im doing this last minute and literally none of my neighbors or people that my dad works with use excel so if anyone could me make up an example

Martha is designing a single-player game. her manager suggests that she plan the design to incorporate future modifications. which principle of game design relates to planning for future modifications?

To produce a starlight effect in her photograph, lina should choose the filter for her camera.