Answer: Option [A]The correct answer is Harike wetland. The Beas and Sutlej meet at Harike. At the confluence with the Sutlej river, Harike barrage was constructed to divert the combined water flows of both rivers to irrigation canals to serve Rajasthan and Punjab areas.
Answer: Option [C]The correct answer is Magnesium. In addition to macronutrients, organisms require various elements in small amounts. These micronutrients, or trace elements, are present in very small quantities. They include boron (B), chlorine (Cl), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu), molybdenum (Mo), nickel (Ni), silicon (Si), and sodium (Na).
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Answer: Option [D]The correct answer is soil composition. Soil pH is a measure of the acidity or alkalinity of the soil. A pH value is actually a measure of hydrogen ion concentration. Because hydrogen ion concentration varies over a wide range, a logarithmic scale (pH) is used: for a pH decrease of 1, the acidity increases by a factor of 10.
Answer: Option [B]The correct answer is Omnivores. An omnivore is an organism that eats plants and animals. Omnivores play an important part of the food chain, a sequence of organisms that produce energy and nutrients for other organisms.
Answer: Option [B]Green belts have the capacity to reduce the noise pollution level by 10-15 dB.
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