What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

O_er_t_o_

Complete the missing letters of the given word.

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

What is the Surname of Barbie Doll?

I have no life, but I can die. What am I?

What you cannot hold but it is yours?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?