When it is important to ensure that there is no natural light in the darkroom? when developing film but not when printing photos

when printing photos but not when developing film

when both developing film and printing photos

neither when developing film nor when printing photos

Nstrumental music that supports the main part(s) chamber music 2. a large group of instruments usually including woodwinds, brass, and percussion band 3. music written for small ensembles for an intimate setting accompaniment 4. a person who leads an ensemble conductor 5. an electronic keyboard capable of multiple instrument sounds