Explanation:

- Breakfast: Breakfast is the first meal of the day, usually eaten in the morning. It provides the body with the necessary energy to start the day. Breakfast foods typically include items such as cereal, toast, eggs, fruits, and yogurt.

- Lunch: Lunch is the second meal of the day, usually eaten around midday. It serves as a refueling opportunity and provides sustenance during the day. Lunch can consist of various dishes such as sandwiches, salads, soups, or leftovers from dinner.

- Snack: A snack is a small amount of food eaten between meals. It is generally lighter and less substantial than a full meal. Snacks can be sweet or savory and can include items such as chips, fruits, nuts, or cookies. They are often consumed to satisfy hunger or cravings between main meals.

- Dinner: Dinner is the main meal of the day, typically eaten in the evening. It is usually a larger and more elaborate meal compared to breakfast or lunch. Dinner can consist of a variety of dishes, including proteins (such as meat, fish, or tofu), grains (rice, pasta, or potatoes), vegetables, and desserts.

Odd One Out:

The odd one out in this list is Snack because it does not represent a complete meal like breakfast, lunch, and dinner. Snacks are smaller and less substantial compared to the other three options. They are typically consumed between meals to satisfy hunger or cravings, rather than serving as a main meal.

In Summary:

- Breakfast is the first meal of the day, providing energy to start the day.
- Lunch is the midday meal, offering sustenance during the day.
- Dinner is the main meal, usually eaten in the evening.
- Snacks are small amounts of food consumed between meals, not representing a complete meal.