Final answer:
Models used in an examination are required to be at least 16 years of age.
Step-by-step explanation:
The subject of this question is English, specifically focusing on the age requirement for models in an examination.
In the context provided, models used in an examination must be at least 16 years of age. This requirement ensures that the models are of an appropriate age to participate in the examination.
For example, if a fashion design school is conducting an examination to evaluate the skills and abilities of their students, they may opt to use models who are at least 16 years old to showcase the garments created by the students.