How does this painting use space, positioning?

Look at las meninas by diego velasquez. this painting is a masterful example of the use of:

Asnap is a three-dimensional form or a two dimensional form?

In this unit, it is mentioned that in order to enter into the field of photography, most jobs require at least a high school degree. since there is a possibility you can attain one of these jobs with just finishing high school, why do some people get an associates or bachelor’s degree?