Question

Which one of the following is a localised resource?
A.Coal
B.Gypsum
C.Iron-ore
D.Water

Answer 1

Hint:It is possible to describe localised resources as the resources found in a local region or geographic region. Localized resources are properties that are unevenly dispersed across the globe and are focused only in certain regions.

Complete answer:
Coal, a dense carbon-rich substance that is commonly brown or black and most frequently forms in stratified sedimentary layers, is one of the most significant primary fossil fuels. Although most coals occur in stratified sedimentary deposits, high temperatures and pressures caused by igneous intrusions or deformation during orogenesis may subsequently be exposed to the deposits, resulting in the production of anthracite and even graphite. While the concentration of carbon in the surface of the Earth does not exceed 0.1 percent by weight, it is important for life and is the primary source of energy for humanity.
Gypsum, composed of hydrated calcium sulphate, is a common sulphate mineral of considerable commercial significance. The mineral is also referred to as selenite in well-developed crystals. Gypsum occurs in large beds associated with other minerals of evaporite (e.g. anhydrite and halite), particularly in sedimentary deposits of the Permian and Triassic; it is deposited from ocean brine, followed by anhydrite and halite. In freshwater lakes and salt pans, it also occurs in large amounts and is an important part of cap rock, an anhydrite-gypsum rock forming a salt dome covering. It is very commonly formed by surface and groundwater hydration of anhydrite, and thus many gypsiferous strata grade downward into anhydrite rocks.
In a number of geologic settings, iron ores occur in igneous, metamorphic (transformed), or sedimentary rocks. Many are sedimentary, but many have been modified by weathering, so it is impossible to ascertain their exact origin.
Water, a material consisting of hydrogen and oxygen as chemical elements and found in gaseous, liquid and solid states. It is one of the compounds that is most abundant and essential. Life is thought to have originated in the aqueous solutions of the oceans of the earth, and for biochemical processes, living beings rely on aqueous solutions, such as blood and digestive juices. On other planets and asteroids, water still occurs both within and outside the solar system.

Hence, the correct answer is option (D).

Note:The Earth's liquid water is primarily found in its oceans (97.25 percent) and polar ice caps and glaciers (2.05 percent), with inland lakes, rivers, and groundwater balancing it. Water purification and recycling are becoming increasingly necessary as the Earth's population rises and the need for fresh water increases. Interestingly, the standards for the purity of water for agricultural use also outweigh those for human use.