That's a big part of it. jpg is short for JPEG, which is the file format for photos, and realistic paintings. So yes, it's a form of lossy compression in pictures. The more compressed it gets, the worse it looks.
If you are still curious, see: https://en.wikipedia.org/wiki/JPEG#Typical_usage
Lossless compression recreates a compressed file as an identical match to its original form. While lossy compression can't be used to compress anything that needs to be reproduced exactly.
They form a compression wave.
Data is raw facts and figures that a computer processes by following a set of instructions. Databy itself has no meaning.For example:Data can be in the form of letter or numbers.
folded
Compression.
fold mountains form
compression
compression
Olde English, Middle English, Modern English and slang English and lingo of English.
Rotting vegetation is overlaid by more rotting vegetation or other material. This is compressed by the mass above and form peat. Compression of the peat continues and form lignite (brown coal) Compression continues on the lignite to form coal (clack shiny rock) Compression may continue to form anthracite , the hardest form of coal . NB with each compression watert/moisture is expelled, so coal and anthracite are very dry.
Mountains
when they are pushed together they form crustal rocks