my child 11 month old.. i think his weight around 8kg.. he has not eat food properly.. stil he not sit alone.... can you suggest any solution

A. If Which I was not able to sit in the growth of the child so I’m going to advise you for everything you need to get a check with a specialist and then Only you can come to know what is the issue,only you can be given Advice on the issue according this is very important for you to get a check with your specialist ones