My son is 2 years old. but he is not interested to eating food. he take breast feeding. he is under weight & his weight is 10.5 kg now. what can i do?

4 meals a day: Picky eaters are hard to deal with. In general, do not let him nibble constantly. Rather feed him 3 meals plus a bedtime snack. Give him choices but never limit the volume of any food. The objective is to create an appetite and that is only done if he will eat volume and expand his stomach. Then patiently wait a month and see. If that does not work u will need him evaluated by a pediatrician.