Select the correct cause for the given situation when a horse pulls a wagon the force that causes the horse to move forward is the force

Select the correct cause for the given situation when a horse pulls a

1.	Select the correct cause for the given situation when a horse pulls a wagon the force that causes the horse to move forward is the force
Answer» the GROUND EXERTS on him he exerts on the ground the WAGON exerts on him he exerts on the wagon ANSWER :B