At 180 degrees longitude, the represents the point at which the eastern and western hemispheres experience different days.
a. equator
b. prime meridian
c. tropic of cancer
d. international date line

The area where the Eastern and Western Hemispheres meet but experience different days is known as the d. International Date Line 

It's actually not a straight line since it accommodates the land - so it goes around some places as not to split the date on land.

Although this may be the opposite of what you think i will say it anyway. you were brought into this world for a reason and you still have soo much ahead of you. not everybody has an opportunity of living a great life, but it doesn’t give you a reason to end everything. somebody in the world loves you, and imagine what you would do to them if you left forever.

Cause of he different elevations  hope this ?