why was oliver twist chosen to ask for more food

Because they tossed up to see who goes first
هذا ما جاء في النسخة الأصلية للقصة - أجروا قرعة بينهم من سيذهب أولا

A council was held; lots were cast who should walk up to the master after supper that evening, and ask for more; and it fell to Oliver Twist.

ماشي يابو عبد الهادي بس اجابه صعبه علي الطالب