Question

Magnets help make electricity,and they hold papers on the refrigerator.what is the correct punctuation

Answer 1

Magnets help make electricity and they hold papers on the refrigerator. 

You can also do: Magnets help make electricity, and they hold papers on the refrigerator. 

Or: Magnets help make electricity. They also hold papers on the refrigerator. 

Answer 2

Magnets help make electricity and they hold papers on the refrigerator.