Although Parker's parents provide him with adequate food and shelter, they often are so busy with their own activities that they spend very little time with him and usually leave him to fend for himself. Parker's parents would be described best as

Parker's parents would be described best as uninvolved.

Explanation:

Uninvolved parenting involves a kind of parents who are careless about their child's needs, even though they may provide him/her with the necessary facilities to have a comfortable life. In general, they often don't demand anything from their children and almost ignore them completely, showing indifference or dismissal.