The Rhine River's name is derived from a Celtic word 'Rēnos'.
Did some research and found (C). One year
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Mount McKinley is the tallest US mountain and Mount Everest is the tallest southwest asian mountain, therefore the tallest mountains in southwest asia are taller than the tallest mountains in the US
The 90-degree angle would be hotter since this is receiving the most direct sunlight concentrated in a smaller area. In areas at the equator, the angle of incoming rays from the Sun is perpendicular (90 degrees) to the Earth's surface during all days of the year. Such areas experience warm climates throughout the year