Answer:
calorie
Explanation:
Out of the given options, calorie is the answer.
Calorie was first originally defined as the amount of the heat which is required to raise the temperature of one gram of water which is placed at 1 atmospheric standard pressure to one degree celsius.
Later in 1925, it was defined in terms of Joules.
The conversion factor is :- 1 Calorie = 4.2 J
