Which term involves an analysis of the proportion of the width and height of the screen used when you develop a storyboard for film and TV? A. letterboxing
B. aspect ratio
C. logline
D. image frames
E. slugline

B.

Explanation:

An aspect ratio can be defined as a ratio of width and height of the screen or image. An aspect ratio consists of two numbers or digits separated by a colon. The first digit of the ratio signify width of the image and second digit denotes height of the image.

If an aspect ratio is written as 2.35:1 then it means the width of the image is 2.35 times larger than the height. Or aspect ratio can be written simple as 16:9.

Therefore, option B is correct.