1. People mainly eat rice, meat and vegetables for lunch and dinner. In the morning, people can have Pho or similar food made from rice.
2. In the past people didn't have the ability to eat a variety of food. The life quality has been improved a lot and people can eat things they want.
3. Restaurant food is often regarded as luxurious food, which is expensive and delicious. Home-cooked food is made at home, simple and cheaper.
4. Because junk food is tasty and convenient.