Complex sentence: Pink-collar occupations tend to be personal-service-oriented worker working in retail, nursing, and teaching (depending on the level), are part of the service sector, and are among the most common occupations in the United States.
Split into simpler sentences: Pink-collar occupations tend to be personal-service-oriented workers with positions in retail, nursing, and teaching (depending on the level). These occupations are part of the service sector and are among the most common occupations in the United States.