There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

I have branches, but no fruit, trunk or leaves. What am I?

Which fur should we be getting from the Lion?

What is the centre of gravity?

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 ?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Which Burger Is Different in below image?

You see me once in June, twice in November, and not at all in May. What am I?