Question

what part of the leaf is composed of wax and is used to reduce water loss?
epidermis
stomata
spongy mesophyll
palisade mesophyll
none of these are correct

Explanation:

The epidermis is the outer layer of the leaf. It has a waxy cuticle which helps in reducing water loss. Stomata are for gas exchange. Spongy mesophyll and palisade mesophyll are involved in photosynthesis.

Answer:

epidermis