I suggest that you read the full Hubpages.com User Agreement which states in part...
"6. PROPRIETARY RIGHTS CONTENT OWNERSHIP
"As a Author (sic), You will be able to incorporate different types of content into Your Hubs ("Content"). Hubpages does not claim ownership of the Content You place on Your Hubs. [...]The Content will be owned by You. "
I have clipped this quote from someone else's answer to a similar question.