Answer:
Normal
Gravity
Applied
Friction
Air resistance
Step-by-step explanation:
The tree is at Earth, so gravity and in consequence, the normal force are acting upon the three. Additionally, it is pulled by the landscapers, so they exert an applied force and the opposite force of the movement, the friction is also acting upon the tree. Finally, if there is air, there is air resistance.
Therefore, the answers are:
Normal
Gravity
Applied
Friction
Air resistance