Looking at one of the Artworks above by Bridget Riley, Frank Stella, and Julio Le Parc, how do they demonstrate the ideas of OP Art?

Well i might get reported for putting this out here buutt why do we all have to bow down to a greater being? yes i accept that there is someone higher that keeps most people going but for me its like something to throw to keep one in their what is the purpose of a religion and why do they always throw that if one dosent obide by the lord he will shun them?

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Name the note a) a b) e c) g d) d