Best Answer: The initial size of the star is what decides. A star is huge, I mean really big, and all that gravity wants to pull itself together (everything attracts). So, the star wants to collapse. But, it creates nuclear fusion, and that is the force that pushes the star out.
2015-11-20T10:18:22-05:00. agricultural. The largest use of the world's water is used for irrigation or agriculture. This is because the high demand of food thus agricultural products are demanded to supply at a rapid amount in just a short time. The population growth influences mainly the use of resources and one is water. Fresh water only amounts little to the drastic needs of society today and much is used for agriculture as studies suggest.
APitch/iStock/Getty Images. Groundwater. Underneath the surface of the Earth lies a very large source of fresh water. Groundwater is the largest source of fresh water on the planet, and the second largest source of water, next to the water found in the oceans. Like the salty sea water, much of it is also not able to be consumed by people or animals.