Which structural adaptation in xerophytes helps to reduce water loss through transpiration?

The correct answer to the question "Which structural adaptation in xerophytes helps to reduce water loss through transpiration?" is Option C: Thick, waxy cuticle and sunken stomata..

The other options — A) Large, broad leaves to maximize light absorption., B) Numerous stomata on the upper surface of leaves., D) Presence of extensive air spaces in the spongy mesophyll. — are incorrect for this IB Exam Prep question. As explained above: Xerophytes are adapted to dry environments. A thick, waxy cuticle provides a waterproof layer, and sunken stomata reduce the exposure of moist surfaces to air currents, both significantly decreasing …