任务分配：观察五个不同的人，看他们的饮食如何根据自己的情况而变化。

This lesson explores the key factors influencing a healthy diet, such as body size, age, gender, and activity level, emphasising personalised dietary needs. It encourages learners to apply scientific knowledge by designing tailored meal plans for different groups, considering their unique nutritional requirements and potential need for supplements. Through this, students develop practical skills in nutrition, health, and lifestyle management.