In a movie projector in your local cineplex, the frames of film go into the projector

a. head first or upside down.
b. feet first or right side up.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.