3
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
A student pushes against a tree with a force of 10 newtons (N). The tree does not move. What is the amount of force exerted by the tree on the student?

### Choices:
1. 0 N
2. 5 N
3. 10 N
4. 20 N

### Answer:
