Why are activities in langars considered seva?

Activities in langars are considered seva because they are selfless acts of service performed to help others without expecting anything in return. Volunteers cook, serve food, and clean in community kitchens to ensure that everyone, regardless of their background, receives free meals. This reflects a spirit of equality, compassion, and generosity. Such acts are motivated by a desire to contribute to the well-being of others, making them a form of non-economic activity. Langars demonstrate how collective efforts can promote harmony, provide support to those in need, and strengthen community bonds.

This question related to Chapter 13 Social Science Class 6th NCERT.
From the Chapter 13. The Value of Work.
Give answer according to your understanding.