A tree is a perennial plant characterized by an elongated stem, or trunk, that supports branches and leaves. Trees are essential components of many ecosystems, providing habitat and food for various species. They play a crucial role in producing oxygen through the process of photosynthesis, where they convert sunlight, carbon dioxide, and water into energy. Trees come in many varieties, including deciduous trees, which shed their leaves annually, and coniferous trees, which have needle-like leaves and produce cones. They can be found in diverse environments, from forests to urban areas, and contribute to soil stability, water conservation, and climate regulation.