Mid-day meals in schools aim to improve:

Nutrition
Attendance
Teacher performance
Infrastructure

The correct answer is: Nutrition.

Mid-day meals in schools aim to improve the nutrition of students. They provide a nutritious meal to students who might not otherwise have access to one, and they can help to improve students’ concentration and performance in school.

Attendance is also an important goal of mid-day meals, but it is not the primary goal. Mid-day meals can help to improve attendance by making it more affordable for students to attend school, and by providing a nutritious meal that can help students to stay focused and alert in class.

Teacher performance and infrastructure are not the primary goals of mid-day meals. However, mid-day meals can have a positive impact on teacher performance by reducing stress and improving morale. They can also have a positive impact on infrastructure by providing a space for students to eat and socialize.

In conclusion, the primary goal of mid-day meals is to improve the nutrition of students. Mid-day meals can also have a positive impact on attendance, teacher performance, and infrastructure.