Answer the following question given this paragraph: 

Image copyright SergiyN, 2014. Coil of copper wire, which conducts electricity well due to metallic bonds . Used under license from Shutterstock. com.


Q: What gives a coil of copper wire the ability to conduct electricity well?

 Choices:

- optical bonds

- metallic electrons

- metallic ions

- metallic bonds

A:
metallic bonds
