Why people needs food?

Food hve many mant kind of energy , can help you doing.
if you don't eat food you will die.

我地點解要食野,因為我地身體內的細胞需要食物內的能量
當我地呼吸時
身體會進行呼吸作用
張身體細胞內的化學能轉為熱能
維持生命和體溫

because we need the energy stored in food, we need energy for survivng, otherwise we can't live or we get diseases.
因為我們需要食物裏的能量去繼續生存，否則我們就會死或者有生病的情況。所以我們需要它們啦。

since we need different nutrient and enough energy to maintain our life from eating .we feel hungry because it give signal to us to remind us to eat food.

Because food have energy to let us working .

2006-10-26 19:44:00 補充：
Food is product energy . If we don't eat food , we will die .