Needle-like leaves are best adapted to a dry environment because they have a small surface area, which reduces water loss through transpiration. They also have a thick cuticle, which is a waxy layer that helps to prevent water loss. Additionally, needle-like leaves often have sunken stomata, which are small pores that allow for gas exchange but also help to reduce water loss. These adaptations allow plants with needle-like leaves to survive in dry environments where water is scarce.