The leading cause of limited water supplies is waste. overuse. water pollution. reduced precipitation.

The correct answer is water pollution.

The leading cause of limited water supply is water pollution.The overall amount of water on earth is same. The shortage of water lies when it comes to fresh water is used for domestic purposes.

The main cause of limited supply of water is water pollution. Due to pollution the water left for use is restricted as polluted water cannot be used as potable water or commercial purpose.

The pollutant from industries, house, agricultural, pesticides and oil spills are discharged in water bodies which makes it polluted and unfit for use.

your spelling is a little off : ]

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.