Question

what is a pressure gradient?
a. a region of extremely high pressure
b. a region of stable pressure
c. a difference in pressure
d. an increase in pressure toward the west

Explanation:

A pressure gradient is defined as a difference in pressure between two regions. Option A describes a high - pressure area, not a gradient. Option B refers to stable pressure, which is not a gradient. Option D is too specific (direction - west) and not the general definition. The general concept of a gradient implies a difference.

Answer:

C. A difference in pressure