Final answer:
Emily should consume quick-acting sugar like juice or candy to prevent passing out, then seek a balanced diet and possibly medical advice. Persistent symptoms may indicate an unhealthy diet.
Step-by-step explanation:
If Emily feels she is going to pass out because of her diet, she may need to consume something with quick-acting sugar to raise her blood glucose levels. A small amount of juice, a piece of candy, or a glucose tablet can help prevent fainting due to low blood sugar. However, this is a short-term remedy. It is important for her to consider eating balanced meals that include a mix of proteins, fats, and carbohydrates to maintain energy levels throughout the day.
If her symptoms are persisting, she should seek medical attention as diets causing frequent lightheadedness may be too restrictive or unhealthy, and she might require a dietitian's assistance.