keeps the wire cool. allows heat to move freely. is a good electrical insulator. has magnetic properties.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A conducting wire wrapped in plastic protects the user because the plastic
Possibilities:
- keeps the wire cool.
- allows heat to move freely.
- is a good electrical insulator.
- has magnetic properties.

is a good electrical insulator.