Which statement shows understanding of another person's emotions and causes?

• A. She's happy because her brother is here.
• B. She's sad because her toy broke.
• C. He's mad because he lost his turn.
• D. They look happy today.

Answer: (A)

Understanding how someone feels involves spotting both the emotion and what caused it. This statement does that clearly by linking happiness to a specific trigger: her brother being here. It shows you can infer not just that she feels happy, but why she feels that way based on what's happening around her, which is the essence of understanding another person's emotions and their causes. The other options mention emotions tied to a cause or describe appearance, but they don’t demonstrate the same clear link between the feeling and its trigger in a social context.