which phrase best describes the concept of file size? (1 point) the files extension the quantity of pixels…

Brief Explanations:

File size refers to the amount of memory space a file occupies. The file's extension indicates its type (e.g.,.docx for Word documents), not size. The quantity of pixels relates to image resolution. The reduction in digital footprint is about minimizing data usage, not describing size. The file's memory dimensions directly refer to how much memory (space) the file takes up, which is the definition of file size.

Answer:

the file's memory dimensions