What is so fragile that saying its name breaks it?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

I’m tall when I’m young, and I’m short when I’m old. What am I?

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

Can you place three balls such that the equation shown in the picture holds true?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Can you identify if it's a murder or a suicide ?