Question

Question was provided via image upload.

Explanation:

Step1: Recall field length standard

A standard American football field (including endzones) is 120 yards, so 100 yards is a realistic estimate for the playing field length. 100 miles is an extremely large distance (1 mile = 1760 yards, so 100 miles = 176000 yards), which is impossible for a football field.

Step2: Match answer to the drawing

The correct estimate is 100 yards, so we use the corresponding eyebrows for part (a).

Answer:

(a) Draw the curved eyebrows (the pair in the top-right box)
(b) No need to draw the cloud-shaped eyebrows, as 100 miles is not a valid estimate for a football field length. The correct estimate is 100 yards, so only the eyebrows for (a) are drawn.