Because they loose their shapes like pyramids.
No. There is no population there to build pyramids.
they are not sometimes prisms
That is a very broad question. There is a lot of data on the pyramids, such as measurements, age, ownership, etc as well as photos, diagrams, maps, videos at Talking Pyramids: See Related Links
they put the bodies of pharaohs and their belongings and sometimes their cat inside the pyramids
sphinx, menkaure, Khufu are the three pyramids of Giza
Afghanistan has a growing population People live longer in Puerto Rico than in
The Sphynx
Population pyramids
Population pyramids
There is no certain size a pyramid has to be. In Egypt many pyramids are different in size. Sometimes the pyramids are a size chosen by the pharaoh the pyramid is for.
limestone
blo-job