What is snow jumping, mountaineering, downhill biking,sea skating ?

  • Thread starter Thread starter P.T.
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P.T.

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Hi, I have a few questions in my project work? can anybody answer them to the point in 3-5 lines?
1. What is snow jumping?
2. What is mountaineering?
3. What is downhill biking?
4. What is sea skating?
5. what is ice climbing?

I need them within a week?

Thanks in advance,
 
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