Why is neural network nonlinear?

Related questions

1. What is the difference between Ann and CNN?
2. Why is CNN used?
3. What is RNN and CNN?
4. What is padding in CNN?
5. What does convolution layer do in CNN?
6. What is the fully connected layer?
7. How does a deep neural network work?
8. What does padding do in CNN?
9. Is RNN deep learning?
10. How do you pronounce ReLU?

Tags

1. #output
2. #element
3. #which
4. #weights
5. #regression
6. #referring
7. #layers
8. #network
9. #linear
10. #respect
11. #neural
12. #affect
13. #comes
14. #problem
15. #gives
16. #function
17. #activation
18. #nonlinear