What is a renewable resource?A resource that can only be used onceA resource that is inexhaustible and can be naturally replenishedA resource that is limited in quantity and will eventually run outA resource that is harmful to the environment       Which of the following is a non-renewable resource?Solar powerWind energyCoalGeothermal energy       What is a point source of pollution?A widespread area releasing pollutantsA single identifiable location or localized area releasing pollutantsA natural source of environmental contaminantsA mobile source of pollution       Which sector is most commonly associated with point source pollution?AgricultureTransportationIndustryResidential areas       Which of the following is an example of non-point source pollution?Industrial discharge pipeOil spill from a tankerAgricultural runoff from fieldsSmokestack emissions from a power plant       What is one of the reasons for the addition of undesirable substances to water bodies mentioned in the passage?Release of hot water from damsUse of water for cooling in industrial operationsDissolved oxygen depletionFertilizer and pesticide runoff from farms       What is eutrophication?The process of water purification in natural ecosystemsThe depletion of dissolved oxygen in water bodiesThe excessive nutrient enrichment of water, leading to increased plant and algal growthThe release of toxic substances into aquatic environments       What is the impact of eutrophication on dissolved oxygen levels in water bodies?Increase in dissolved oxygen levelsNo change in dissolved oxygen levelsDepletion of dissolved oxygen levelsStabilization of dissolved oxygen levels       Why do terrestrial life-forms require fresh water instead of saline water?Saline water contains harmful microorganismsSaline water has a lower oxygen contentTheir bodies cannot tolerate or get rid of high amounts of dissolved salts in saline waterFreshwater is more abundant and easily accessible       Where is most of the water on Earth's surface found?UndergroundIn rivers and lakesIn ice-caps at the two poles and on snow-covered mountainsIn the atmosphere as water vapor