What has one letter and starts with an E?

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

I have an eye but still cannot see.

Who 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?

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

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

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 write down eight eights so that they add up to one thousand?

I don't get anymore wetter, no matter how much rain falls on me.

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