To check the total amount of water Noah needed, he can use an addition equation that represents adding the amount of water needed for each of the 7 plants.
The correct addition equation that shows this is:
14 + 14 + 14 + 14 + 14 + 14 + 14 = 98
This equation reflects the total amount of water used for each of the 7 plants, each needing 14 ounces of water. So the first option is the right one.