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A line drawn on a weather map connecting points that receive equal amounts of sunshine are Isohel. Joins points where the amount of sunshine is the same.

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All the above given reasons add to environmental hazard caused by various factors including humans.

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Chemical weathering is a name given to Chemical interaction of oxygen, carbon dioxide or water with the minerals in the rocks. Chemical weathering changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.

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The polar regions of the earth cannot support forest growth because The rainfall is very low, The growing season is short in these areas and The ground is often frozen or snow or ice-covered.

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1. "The winds are divergent, and spiral out from the centre of high pressure": This statement is correct. Anticyclones are areas of high atmospheric pressure where the air descends from above. As the air descends, it spreads out horizontally, leading to divergent winds that spiral outwards from the center of high pressure. 2. "The air moves clockwise in the Northern Hemisphere and anticlockwise in Southern Hemisphere": This statement is incorrect. In the Northern Hemisphere, the air around an anticyclone moves clockwise, while in the Southern Hemisphere, it moves anticlockwise. This direction of movement is due to the Coriolis effect, which is a result of Earth's rotation. 3. "It is accompanied by heavy rainfall": This statement is incorrect. Anticyclones are generally associated with fair and dry weather conditions. The descending air in an anticyclone suppresses the upward movement of moist air, leading to clear skies and lower chances of precipitation. 4. "A sudden rise in barometric reading heralds the approach of anticyclone": This statement is correct. An anticyclone is often characterized by high atmospheric pressure at the surface. As an anticyclone approaches, the barometric (atmospheric pressure) reading tends to rise, indicating the presence of the high-pressure system. In summary, anticyclones are areas of high pressure where air descends and spreads out, leading to divergent winds. The air movement is clockwise in the Northern Hemisphere and anticlockwise in the Southern Hemisphere. Anticyclones are associated with fair and dry weather, and a sudden rise in barometric reading indicates their approach. Therefore, the correct answer is Option A, which means only Statements 1 and 4 are correct regarding anticyclones.

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All of the following types of climates occur in the southern hemisphere except Tundra. Tundra climate is mainly found along the coast of the Arctic Ocean.

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The country that has the greatest length of the day during summer is Norway.