Hi, my name is John and this is my poster of plant and photosynthesis. As you see here are some arrows pointing at each picture, this is why plants need light. So sunlight/light shines on the plant then the plant absorbs the sunlight/light and sunlight/light are the plants food. The bottom right picture are leaves which are called chlorophyll, the chlorophyll traps the sunlight/light inside the plant. And now it grows.