Why do different trees have leaves with different shapes?

Different trees have leaves with varying shapes due to adaptations to their specific environments and climates. Leaf shape influences factors such as light capture, water retention, and temperature regulation. For instance, broad leaves are often found in humid environments where light is abundant, while needle-like leaves in conifers reduce water loss in drier conditions. Additionally, evolutionary pressures and genetic factors contribute to the diversity of leaf shapes across tree species.