What does below rebus means ?

Who can jump higher than a Mountain?

What type of tree can I carry in my hand?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

81 x 9 = 801. What must you do to make the this equation true?

I can be cracked, made, told, and played. What am I?

What is the difference between a jeweller and a jailer?

Prove that the below maths equation is true.

8 + 8 = 91

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?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?