The three sources of food energy are protein, carbohydrates (sugars), and fats.
bread
Carbs, Protein, Fat
The number one source of energy for the human body is carbohydrates, which are broken down into glucose to provide fuel for our cells. Other sources of energy include fats and proteins.
Mitochondria
Yes. People eat food all the time. food is one of the sources your body needs to get energy to do stuff.
yes
There isn't a single "best" energy resource as the best choice depends on various factors such as location, availability, cost, and environmental impact. It's important to have a mix of energy resources to meet diverse needs and to transition towards cleaner, more sustainable options like renewable energy sources.
uh...there is the fossil fuels- coal oil and natrualgas, but I don't know the last one...edit:Uranium!!!
In nutrition, yes
one natural resource is the sun
One advantage of geothermal energy compared to other renewable energy sources is its consistent and reliable power generation, as it is not dependent on weather conditions like wind or sunlight.
One can find more information on energy efficient lighting from the following sources: Earth Easy, Energy Star, Carbon Trust, Living Greener, NSW Environment and Heritage, Energy Saving Trust, to name a few.