Does the value of the kinetic energy of the body depend on the choice of the reference body?

The speed of the body depends on the choice of the frame of reference, therefore, the kinetic energy also depends on the choice of the frame of reference.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.