This puzzle explores two different aspects of mathematical duality. First, each picture can be described by a two-word phrase wherein one word begins with CO-, and the other word is gotten from that word by changing one letter in what comes after CO-. Specifically, these phrases are:
CORRODES RHODESReading the changed letter from the shorter word spells out HIT CONTROL C, which clues one of the answers, COPY (which starts with CO-).
Additionally, every image contains two or three arrows, which you are supposed to reverse. Doing so (maintaining the location and direction of the shaft of the arrow, but taking mirror images of the branches of the arrow) turns these arrows into the shapes of letters. Reading these letters spells out ANSWER BORON, and indeed BORON is the other answer to the puzzle.