It's a combination of several things. Light and composition are two of the biggest things... the subject matter can make a difference, too, although a good photographer can often take the most ordinary thing and turn it into something spectacular.
More than anything though, I think it's the photographer's ability to draw the viewer into the photograph. Something needs to grab your attention and hold you there to make it a truly good photo. This can be done through composition, subject matter, style, color, anything and everything, really.
the answer is D. The plight of working people
Renaissance was more later than baroque and it was more limited in orchestration