Short Riddles and Answers

Question: Half of those who read this riddle, I am your best friend.
I depend on you, but it's you I will defend.

What am I?

Question: I am a child and a simpleton at once.
All are born with me,
But rarely am I possessed at death.

What am I?

Question: If you toss a coin ten times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Question: What is something of which there are multiple, but you can't make full a list of, while you can make a list of the worst ones.

Question: Farrah has two brothers. The first brother is called feather one and his second brother is named feather two. What is his name?