Answer:
Internal
Explanation:
During cellular respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. Energy released during the reaction is captured by the energy-carrying molecule ATP.
I would say the first one
Answer:
only 30% of total energy will be useful ..
So, Useful energy =

13.5J energy is useful
Answer:
A- First table
Explanation:
All of the tables besides the first have results that do not realistically match the human activity. The first is the only one that the human activity and the results are accurate together.