Presentation software allows users to what ?

What are compression artifacts? 1) visible defects in the picture caused by the nature of the compression algorithm. 2) numbers that tell a web server how much to compress a picture for faster transmission. 3) invisible defects in the picture preserved by lossless compression. 4) numbers that tell a photo editing program how much to compress a picture for faster transmission.

Me and category do i put them in because this is science

Beginning in the 1940s, first-generation computers used circuitsvacuum tube technologylaser technologytransistors