2D is flat and 3D is visible in 3 dimensions and looks like it is popping out.
Yep if they give you answer correct.
Answer:
People vary in personality and social behaviour. It is generally accepted that some of this variation is due to differences in genes and some to “environment”—that is, to differences in people's experiences. This chapter is about the latter source of individual differences, the variation that is not due to genes.