Final answer:
Lizards stay in shaded spots to remain protected and reduce water loss during estivation, slowing their breathing and heart rate while only doing critical activities to survive.
Step-by-step explanation:
The lizard would stay in a shaded spot to remain protected from predation and water loss. Its breathing and heart rate would slow as it begins estivating. Then it would only do critical activities needed to sustain its living state.
Learn more about Estivation in lizards