What is 'adopt as care dependent'?

"luthienrising;c-15802811" wrote:
The claiming as "dependent" thing should be available to any Sim in the household YA and up: http://forums.thesims.com/en_US/discussion/comment/15765660/#Comment_15765660

Thanks, @luthienrising . According to that, SimguruNinja says multiple caregivers can be added, so that will be a huge help for my sweet, old grandies.