The answer would be C<span>. Music often takes away from a film’s believability and realism. Often time music is added to make the film believable and realistic, such as the creaking of a door or stairs without showing the actual scene. It also adds to the tone that the story is portraying.</span>
A. is the answer i believe <span />
atleast how I could see it- is that the more children a family has, a more motherly role is put onto the woman of the household, ending up working more hours at home and such to tend to their families. whilst men work more, hence forth their not home as much or doing outside laboring activities that can count towards this graph. more children, more work with cleaning, caring, etc. etc. :)
Better technology that does not exist today. Maybe floating things or something?
Hope this work for you :)