I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

The more you take me, the more you leave me behind.
Who Am I?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Before Mount Everest was discovered, what was the highest mountain in the world?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

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