Why do leaves have different shapes?

Leaves have different shapes to optimise their function in varying environmental conditions. Broad, flat leaves maximise sunlight capture, making them ideal for shady environments. Needle-like leaves, such as those on pines, reduce water loss and withstand cold or arid conditions. Some leaves have jagged edges to promote airflow and reduce fungal growth, while others are lobed or divided to minimise damage from strong winds. These diverse shapes reflect the adaptability of plants to their habitats.