Welcome to EvC. We're glad you like what you've seen so far.
I have a big reluctance to allow anyone here to do your home work for you and that is what it appears you are trying to make happen.
There has been previous discussion here on sexual selection. I suggest that you do a search for it and ask questions on the threads you find.
Perhaps you should tell us what you've learned so far in your research. That might convince me that you've actually done some work on it.
Don't worry too much about your English. We'll help with that too.
(sexual selection does occur in human beings)
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