Another term for introduction is an exposition.
exposition: the part of a play or work of fiction in which the background to the main conflict is introduced.
Put a photo up for more explanation.
Beneath the deep blue sea
The answer here would be answer choice C. When reading this statement out loud, one can tell that there is a "gap" at the beginning between "he" and "is". It starts up an entirely new statement without any punctuation, so we can tell that this is the only place that our semicolon deserves to go.