When a musical idea is restated retaining some original elements but aletering others it is called?

In "thirty are better than one" 1963 by andy warhol describe to what degree this image depicts rhythm or pattern

What benefits are there to using an online filter app?

I'm dead lol: a professor was traveling by boat. on his way he asked the sailor: “do you know biology, ecology, zoology, geography, physiology? the sailor said no to all his questions. professor: what the hell do you know on earth. you will die of illiteracy. after a while the boat started sinking. the sailor asked the professor, do you know swiminology & escapology from sharkology? the professor said no. sailor: “well, sharkology & crocodilogy will eat your assology, headology & you will dieology because of your mouthology.