Proof for Dependent Parents

[immihelp]

Hi,

My parents are applying for visitor visa B2 to visit USA. My grandparents are staying with them. Could you tell me what proof should my parents show to the consulate to convince him that they are taking care of their old parents and so must return to India.

Warm Regards

[immihelp]

Show family photos and whatever other proof that they can show, such as payment of medical bills, other daily expenses like food, clothes or anything else.