Answer: High Ultra violet dewlap reflectance is most important in brightly lit habitat.
Step-by-step explanation:
lizards have a dewlap, this dewlap is what shade them from direct reflectance of ultraviolet ray. It an unshaded place where it is sunny high ultra violet dewlap reflectance is important as it becomes a means of adaptation to such areas.
Dewlap is a large layer of skin under the throat that they can fan out like a flag. Flashing the dewlap is important in territorial displays, warning signals, and courtship.