"What am I" #Riddles to Twist Your Brain

It contains riddle which will twist your brain. In these riddles, you have to read the given riddle statement carefully and then tell about "What am I". You can take your time to solve each riddle. Try to solve each riddle in the allocated time. However, if you need more time to solve a particular riddle, then you can pause the video.
Answers of these What am I, Riddles are given immediately. Post your answer for the last riddle in comments.

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