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Hi everyone, hemorrhoid also known as piles is very much painful and this is caused when tissues gets enlarge, or it becomes weak etc. The tissues gets swollen that contain veins and forms hemorrhoid. This is very much critical situation as the pain is not bearable and it should be cured as soon as possible.
Mechanical weathering is when rocks are broken down by physical agents like ice, wind, or water, and chemical weathering is when rocks are broken down by chemical reactions. Jonah asked, 'So let me get this straight: I understand that other things in nature can break down rocks, but how do chemicals cause rocks to break down, too?'