Why are there two ways we can measure energy food (KJ or CAL), what is the reason for this and why. detailed, please

If you are going to enter a wrestling competition and need to make a certain weight, which method would best utilize? a: pinch an inch b: circumference measurements c: bathroom scale d: body-fat scale

To avoid food poisoning, perishable items should not be stored in the refrigerator for more than days.

Deciding how to get home is considered a routine decision