Which is the correct shadow of the bird?

Give it food and it will live; give it water and it will die.

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

I have an eye but still cannot see.

Who am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.