Which of the following would be the most important adaptation for a desert-dwelling animal to possess? . a) heat dissipation structures. b) heat conserving structures. c) energy conserving behaviors. d) water conserving behaviors.

The correct option is D.

Desserts generally are always very hot and there is always little quantity of water available, this is because the annual rain that fall in the area is very low. For those animals living in the dessert, they have to find a way of conserving water in their body in order to reduce the amount of water they loose due to excessive heat that is present in their environment. This is crucial, because without water these animals will not be able to survive.