Question

What is the rule using a comma and the word "and"?

-------resource background, and the ability.
Writeacher
You'd use a comma before "and" in these two circumstances specifically:

* in the middle of a compound sentence (#2 in the site linked below)

* just before the last of a series (#1 in the site linked below)

http://grammar.ccc.commnet.edu/grammar/commas.htm