Answer:
The answer is A
Explanation:
I did a test about this and this is one of the things i remember
The answer to the first unknown is "Sensation" while in the second unknown is "Perception". These two words are very different such that the "sensation" is when the sense organ detected external physical stimuli but the "perception" is the processing, organizing and interpreting of those stimuli captured by sensation in the brain.
The answer is myosin, i just took the exammmmm :))