Final answer:
Michelle and Andres being described as middle-class parents indicates their social status and socioeconomic group.
Step-by-step explanation:
Michelle and Andres being described as middle-class parents is a social status classification. The term 'middle class' refers to a socioeconomic group that falls between the working class and the upper class. It is associated with a certain level of income, education, and lifestyle that provides a comfortable living but does not reach the level of wealth and privilege of the upper class. Middle-class individuals typically work, own homes, and have access to education and healthcare.