Final answer:
Gustav is best described as part of the working class, reflecting his steady job in manufacturing which has evolving demands but offers limited upward mobility compared to higher education.
Step-by-step explanation:
Gustav, who has earned a certificate in metal fabrication and works in airplane assembly, can best be described as Part of the working class. This categorization reflects his steady full-time job in the manufacturing sector. Jobs like Gustav's, which often require some post-secondary education but may not offer the upward mobility associated with higher education, underscore not only the evolving demands of the job market but also the economic limitations that can be associated with working-class positions. As manufacturing jobs change and the value of higher education rises, the working class faces challenges amidst a shifting economy.