Why is the Earth, the only planet which is the only habitat of human beings?

Choose the right word and fill in the blank provided below.

[ light, third, $24$hours, seasons, round]

The Earth is the _____ planet of our solar system.

Name the following.

The only planet that supports life: ______

Answer the following questions with the help of the above picture.

Choose from the following:
(North, axis, South, $24$, third, fixed)

Earth is the _____ planet from the sun.

Why does the earth seem flat?   

Observe the following picture.

What is the position of the earth from the sun?

How does the earth look from spacecraft?                        

Who am I?

A ball without fire

I turn round and round

You turn with me

And so does the ground.

l am the _____.