HOW DID THE DOE WIN THE RACE RI RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

The answer is the letter 'N'.

The riddle says 'take me out of a window and I leave a grieving wife'. Now if you think carefully and analyze some of the words in the sentence, you will find the answer to the whole riddle. In this case, the word is 'window' and if you remove the letter 'n' from the word, the word will become widow (I leave a grieving wife). Now the first sentence will make sense as if you read.

he second sentence says 'but stick me in a door, and I can save somebody's life'. Now in this sentence, the word 'door' is the one you need to analyze. If you add the letter 'N' in the word door, it becomes donor(I can save somebody's life). Did you answer this riddle correctly?
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The letter 'n'. Throw out the letter n from the word window and you have widow. Bring back the word n to door and you have donor. Did you answer this riddle correctly?
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An icicle. Did you answer this riddle correctly?
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Stay ahead! Did you answer this riddle correctly?
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It was always tied up Did you answer this riddle correctly?
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A mushroom. Did you answer this riddle correctly?
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It was a tie! Did you answer this riddle correctly?
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His rear end! Did you answer this riddle correctly?
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A last name. Did you answer this riddle correctly?
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Because they're always in the pole position! Did you answer this riddle correctly?
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The ocean! Did you answer this riddle correctly?
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You're in second place. You didn't pass the person in first. Did you answer this riddle correctly?
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The answer is that one girl took the picnic basket. She took the last bottle of wine while it was in the basket. Did you answer this riddle correctly?
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The Hunger Games. Did you answer this riddle correctly?
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A mushroom Did you answer this riddle correctly?
YES  NO