To be healthy, we need to eat a … diet every day.

Step 1: Analyze the question The sentence is: "To be healthy, we need to eat a ___ diet every day." We need an adjective that describes the kind of diet that promotes good health.

Step 2: Explain the concept This question tests collocation, which means words that naturally go together in English. In health and nutrition, the standard phrase is "balanced diet", meaning a diet with the right proportions of carbohydrates, proteins, fats, vitamins, minerals, and water. You will also see this in Nigerian Home Economics, Biology, and Agricultural Science.

Step 3: Test each option

• A. balanced: Correct. "A balanced diet" is the established phrase, and it matches the idea of being healthy.
• B. complete: "Complete diet" is not a standard collocation. It sounds unnatural here.
• C. mixed: A diet can include different foods, but "mixed diet" does not carry the health meaning of having all the nutrients in the right proportions.
• D. delicious: Food can taste good without being healthy, so this does not fit the purpose "to be healthy."

Step 4: Answer The correct answer is A. balanced.

The sentence reads: "To be healthy, we need to eat a balanced diet every day."

Step 5: Exam tip For "fill in the blank" questions, think about fixed phrases first. Memorize common collocations like balanced diet, heavy rain, strong tea, make a decision, and take a chance. If one option forms a phrase you have heard many times, it is usually the answer. Also check that the word fits the context clue, which here is "to be healthy."