Contest Contest Please join.

Contest for 15 min

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Hello, steemain! today I am gonna to make a contest and please join it. The contest is about the science so if anyone has knowledge about science. then please answer the question which i will ask you from in a comment.

                                           **Answering Step**

first come in a comment and write "present"
the question will ask of you.
The answer should be given in at least 30 seconds.
one-word answer.
Cheating will result in a kick from the contest.
the result will be given to you.
REWARDS
all the income from this post will be sent to users.
THank you!
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