Communication. Him @do you want this?

My son is about to be 3yrs old in just a month. He speaks a lit of things but does not always respond to questions. Like if I ask him "what is this?", he will answer correctly but if I ask him @do you want this?" He would not say anything but if I don't give it to him he would say oh Baby wants (whatever it is) - he calls names correctly. He uses a lit of echolalia but at the correct places. Like "baby wants to go ghumu ghumu" or "let's go ghumu ghumu" or "ohh, baby got a bubu". I am not sure if it is developmental delay or expected at this age. He does eye contact. He responds to our instructions like "wait here", "give it to (whoever it is)" or "take it". He does not answer to questions like "do you want this" or "do you like this". In case you are wondering about autism, his m-chat score is 1. He just has some communication issues is what I feel. Please suggest.