Introduction :-

Mystery refers to the incompletion of anything on a topic . It means suspense . 

Main body :-

Mystery is also very important in one's life . People have to face many mystery in their life . It makes thrills and spicy atmosphere as there is no solution exists . Mystery is divided into 
"traditional mystery", 
"legal thriller", 
"medical thriller", 
"cozy mystery", 
"police procedural", 

Sometimes it also causes some trouble . As it is so excited people even could face heart-attacks due to the stress on the nervous system. 

Example :-

We don't know much about the black hole. A black hole is a place in space where gravity pulls so much that even light can not get out. We can't get any reason for it .

Conclusions :-

Peoples are very fond of thrills and spice so they like mystery stories / films/fiction very much .

FINALLY, before I started this speech, to all of you, it was a mystery too. 
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something it  is difficult or impossible to understand or explain is known as mystery..

Mystery and the study of the unknown has always fascinated

people. The search for truth in the "uncomprehensible" has led to

many controversies. Some believe in the "supernatural", while others

simply do not. Both types of people obviously have their own

reasonings for believing or disbelieving in it. There are numerous

world famous mysteries that are still controversial and remain

"unsolved" to this day. Some of these mysteries include the Loch Ness

Monster, the Abominable Snowman, and the Bermuda Triangle.

The Loch Ness Monster is a legendary animal that supposedly

resides in the depths of Loch Ness, a long narrow lake situated in

rural Scotland. Stories concerning the monster date back to the 6th

century A.D. The region was in complete isolation until a road was

built alongside the lake in 1933. Then large numbers of people

travelled through the region for the very first time. Over the years

thousands have reported seeing something in the lake. Most reports

depict a long neck surging from the water with a small head of a

unknown creature. Pictures have even been taken of this "creature",

but most scientists however, refuse to believe any creature of this

kind lives in the Loch Ness. They claim that most reported cases are

simply products of overactive imaginations, and as for the pictures,

scientists say they are not lucid enough to distinguish items clearly,

and some pictures are dubbed as "fake".

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