The answer of your question is C
<span>Using harmonies that travel by 1/2 steps is called _semitone____ harmony.</span>
If we stare at a pattern for a sufficient amount of time, our brains will cause the pattern to spontaneously reorganize itself.
Many psychologists believed that humans' pattern recognition abilities exist to aid us in our survival. This ability make us able to quickly identify possible danger/occurrences from several sign, which will help us to produce faster fight or flight response.
Im pretty sure thats Vignette and that one where it blurrs the outer part of the picture