It consists of a few dark absorption lines on a continuous spectrum that is otherwise independent of wavelength.
It consists of a smooth blackbody curve corresponding to a temperature of 6300 K, with no other prominent absorption or emission features.
It consists of hundreds of dark absorption lines superimposed on a bright continuous spectrum that peaks in the yellow, near the center of the visible region.
It consists of hundreds of bright emission lines that cluster near the middle of the visible region.
It consists of a few bright lines widely separated from each other, mostly in the yellow portion of the visible range.