Picture plane is in perspective, the imaginary plane corresponding to the surface of a picture, perpendicular to the viewer's line of sight.
D. The average 8 to 18-year-old spends <em><u>3 hours or more</u></em> per day on average in front of a screen doing very little to no physical activity.
The classical music was popular music at the time. So I would go with that, nationalism, and immigration. Do not quote me on it though.
