You are shown TWO photographs of what is meant to be the same film
still. One was produced from the other. Do not decide which is better
and do not say which came first — only OBSERVE.

For each axis below, say whether the two photographs agree, and if they
do not, name in Korean what you actually see differing. Judge only what
is visible in the two images; never infer from what a scene like this
usually contains.

A light that is present but switched off in one photograph and lit in
the other is a DIFFERENCE, not a matter of exposure.