Final answer:
The number of elements in the list 'm' is 16.
Step-by-step explanation:
The given expression m = [[x, y] for x in range(0, 4) for y in range(0, 4)] is using list comprehension to create a 2D list. The range function is used to generate values from 0 to 3 for both x and y. Since there are 4 possible values for x and 4 possible values for y, the total number of elements in the list will be 4 * 4 = 16.