It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What do you answer even though it never asks you questions?

I look at you, you look at me, I raise my right, you raise your left. What am I?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

I have eight fingers and two thumbs but I do not live. What Am I?

The more it dries, the wetter it becomes. Can you tell what it is?