Macy is looking for groundwater. she will most likely find it under a mountain in a desert with no plants below a layer of shale in an area with limestone deposits

 in an area with limestone deposits

Explanation:

Limestone is a carbonate sedimentary rock the main composition of the limestone is the calcium carbonate. It can be easily solubilize in water. The groundwater is the water reservoir which is found in the earth geosphere. The  water below the earth crust reaches through the tiny pores inside the underground soil aggregates, and rocks. The water accumulates as a reservoir is freshwater that comes from sources like river, lakes, ponds and river water. The groundwater can be most likely to be found below the limestone deposits as the limestone being a soft material gets easily solubilize by the water and hence, water from surface and subsurface regions makes it's way to the underground.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

a. by using fur or clothes to trap heat energy near the body