Answer:
The number 4 is the right answer.
Explanation:
As you can see in the image you attached to the question, just below the map there is a bar that shows the change in the length of the growing season in days. You can see that the days marked in this mark are represented by colors and that these colors can be seen on the map.
Within the map, the state marked with the number 4 is in white. This color, within the bar, represents zero days of change in length of growing season. This allows us to conclude that in state number 4 the duration of the growing season has remained almost the same.
