When wet clothes are keep in the sunlight, Due to the sun's hot rays, the molecules of water which present in the clothes gain energy and evaporates. So it becomes water vapour (gaseous form of water) and evaporates there by leaving the clothes. Hence the clothes get dry up. 
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When wet clothes are dry due to evaporation  held by the increase in temperature during the evaporation the water inside the clothes will shrink and as a result due to shrink of clothes the water inside the clothes losses its quantity at last all the water inside the clothes will evaporate so the clothes will get dry or shrink by increase in temperature