What is one external learning barrier that can affect student performance?

The option that addresses an external learning barrier affecting student performance is the divorce of parents. This situation can lead to emotional instability, stress, and changes in living arrangements, all of which can significantly impact a child's concentration, motivation, and ability to engage with their studies. When parents go through a divorce, children may feel a range of emotions such as sadness, anger, or anxiety, which can distract them from their academic responsibilities and hinder their overall performance in school. The stress associated with family dynamics can create a challenging environment that may detract from a student's ability to focus and succeed in their educational endeavors.

While factors like technology use, weather conditions, and class size can influence learning, they do not typically have the same profound personal impact on a student's emotional and psychological state as parental divorce does.