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<h2>A - Either Side of The Vaginal Opening</h2>
<h3>The purpose of these glands are to lubricate the vagina so the body is ready for sex.</h3>
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Answer:
Rain
Explanation: Rain can wet the mud, and cause it to slide. This is one cause of a landslide that humans don't cause. This is why rain is a natural cause for lanslides.