Principle #1 genetic variation:An owl butterfly looks like an owl.There wings look like owl eyes. Lizards like to eat these types of butterflies. Not all butterflies have the same looking wings. some are different then others. That affects them because some look more like owls then others.
Principle #2 overproduction & struggle for Existence: owl butterflies reproduce in groups or single.When they reproduce in groups only a few make it . THe ones that struggle the most are the ones with bad geneict and dont look like an owl. This will affect them from reproducing and fRom camoflge.
Principle #3 Differential survival & Reproduction : The trait that helps the owl butterfly survive is its looks or camoflage wings because some wings dont look like owl eyes and some do.
Principle # 4 Changes in gene pool: The gene pool is better Dna traits. The one with better looks are gonna reproduce.