What does this rebus riddle means ?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What building has the most stories?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

I am the fastest animal but cannot climb the tree. What am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?