Questions

A trampoline is a sheet or web supported by springs in a metal frame and is used as spring board.

A promise. 

The Promise made to somebody by you can be break but you cannot touch it.

Abraham Lincolon was an American statesman and lawyer who served as the 16th President of the United States from March 1861 until his assassination in April 1865.

Lincoln led the United States through the American Civil War—its bloodiest war and perhaps its greatest moral, constitutional, and political crisis.

When you can't hear it is called as Deaf.

Demography is the scientific study of Birth and death, The well being and the Growth of population. In brief, it is the study of human populations based on their size, composition and distribution across space – and the process through which populations change.