Kangaroos licking their arms to keep cool:. 1. A snake lying in the sunlight to warm up 2. Elephants flapping their ears to dissipate heat 3. A snake lying on a warm rock to warm up

Explanation:

Homeostatic means maintaining a stable internal and external heat. Since both needs to be kept at balance, it is necessary animals either gain or lose heat in their day to day activities.

Heat is lost or gained by various methods such as

Conduction: Loss/Gain of heat by bodies in contact

2. Radiation: Lost/Gain of heat by bodies not a contact

3. Radiation: Loss/Gain of heat due to Air current

So a. Kangaroos licking their arms to keep cool, is doing it through Evaporative cooling

A snake lying in the sunlight to warm up is by Radiation

Elephants flapping their ears to dissipate heat is by Convection

A snake lying on a warm rock to warm up is by Conduction

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.

it creates acid rain