B. single participant debate
c.public hearing
Answer:
Mental picture.
Explanation:
Something you use to depic.
The answer is: D) a piece of equipment.
The word <em>device </em>is a piece of mechanical or electronic equipment which is adapted for a particular purpose. In that respect, <em>equipment </em>refers to the necessary items for a particular purpose.
The rest of the options are incorrect because the narrator deals with a concrete appliance that measures calories - it does not burn food and it does not concern an abstract thought or scientific theory.
