To write an inequality that shows the relation of the number of pets in the Jackson family to the number of pets in the Chang family, we would state that the number of pets in the Jackson family (1 pet) is less than the number of pets in the Chang family (4 pets).
The inequality would be:
1 < 4
Based on this inequality, the Jacksons have fewer pets than the Changs.
So, the correct response is: 1 < 4. The Jacksons have fewer pets.