Which is the correct shadow of the bird?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

If six children and two dogs were under an umbrella, how come none of them got wet?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

If you say my name, I will no longer exist. What am I?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

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 riddle which can be asked all day with a different correct answer each time.

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?