Answer:
The Three Sources: Water, Sun and the Air
Explanation:
Water come from large bodies of water on earth. It get cycled through the water the cycle. The constant evaporation form land waters such as lakes, oceans, pond and puddles. Also water can be evaporation from plants which is called Transpiration. Now as this happens, the water rise up, cools down and fall from the sky a precipitation which is how we get our water.
Sun produce it light from outer space. The sun heat help regulate the earths temperature and also living organisms. The Sun light produce from the sun help organism grow such as plants using the sun light for photosynthesis to make food. Without the sun's heat and light, life on Earth would not exist.
Air comes from the mixture of nitrogen, carbon dioxide, neon, hydrogen and oxygen produce by the plants that grow on earth. During the process of photosynthesis, the plants take in sun light and carbon dioxide from us humans or left over carbon in the air and use this to make energy or food for themselves. And as by converting the sun light and carbon dioxide into food, they release oxygen which is necessary for sustaining life.
