Final answer:
Xiao's ability to understand the emotions and motivations of characters in his acting roles indicates high interpersonal intelligence.
Step-by-step explanation:
According to Howard Gardner's Multiple Intelligences Theory, Xiao's ability to understand the emotions and motivations of characters in his acting roles indicates high interpersonal intelligence. Interpersonal intelligence, also known as social intelligence, refers to the ability to understand and interact effectively with others. It involves skills such as empathy, communication, and understanding social cues and relationships.