Many people don't have enough land to grow food to feed themselves or the money to buy seeds, fertilizers, and tools. Others can't grow enough food because of war nearby. In a war, farmers can't safely look after their crops. Sometimes there is enough food, but people don't have enough money to buy it. They are unemployed or paid low wages, and food prices are too high.
Some food goes bad in storage.
Other times there is extra food in one place, but there are problems transporting it where many people are hungry. If governments spent less money on military budgets, they could spend more money on food programs. Many churches help community food programs for hungry people. There are breakfast clubs, meal programs, and food banks. Sometimes parishioners show people how to manage their money wisely and how to cook the most nutritious food.