Children need to be comforted with hugs, communication and validation, and spending time with them until they feel better. They need to cry when they feel hurt or sad. They need to yell when they are angry. They don't just need something to eat. It's not uncommon for food to be used as a punishment.
Kids ask to eat because of their natural sense of hunger.
Corrupting this by forcing them to unreasonably wait will destroy their ability to determine when they are really hungry. Hunger Forcing kids to eat when they are not hungry, or feeding them when they are bored will, again, destroy their sense of hunger. This teaches them to ignore being hungry or being full. Realistically, arguing about eating everything on a child's plate is ridiculous and unnecessary. Fighting over meals creates more harm than good by having a central issue focus on eating.