Are advertisements about weight loss without exercise true?

Cardio Mix: The best way to lose weight is cardio and a balanced diet. However, do not always do the same exercise or you will increase your risks for stress injuries. Mix things up with running, biking, swimming, or circuit training. Ultimately you need to burn more than you consume. Exercises such as crunches, planks, sit-ups, etc are good for toning the abdominal muscles, but cardio is best for weight loss.

Possible: It's possible to lose weight without exercise but highly difficult. Appetite suppression is typically the method (imagine starvation or "cleanse" fad diets) used to lose weight without exercise. If exercise isn't an option, seek a counselor for other courses of action.