sitting cross-legged does not cause critical side effects, what you should be aware of is that it can cause high blood pressure and lead to poor posture. What would be suggested is stopping doing this for a long time.
The answer is option C "Calories" Calories is a unit of measure for food or energy. Calories are also the amount of energy you consume when you eat or drink something. Kilocalorie are equal the amount of 1000 calories.
