Not sure what this refers to; one energy source related to the ocean is getting energy from waves, another is tidal energy.
fossil fuels are the least costly for us to use.
Currently, human's conventional source of energy is fossil fuel.
Animals obtain their energy and carbon from the food they ingest. Carbohydrates and protein are a good source of carbon and energy.
FOOD
Animals obtain energy by what they eat. It is all a big cycle, the sun(main source of energy) gives energy to the grass which gives energy to the cow, though in smaller amounts.
Consumers mainly obtain energy from the food that they eat. This means that their source of energy will be from the producers.
Ocean Thermal power.Ocean Wave power.
The ammount of solar energy used in America is currently at 23%.
The Sun. Second, the CMBR (C osmic M icrowave B ackground Radiation).
None. There is only a transfer of energy. You obtain the energy from a consumed source example: you eat food which causes a transfer of energy but the food does not provide energy.
The insects food source, for example, a plant would absorb energy from the sun and taking in the fact that a plant is the insects food source, it would most likely eat it and obtain the plants energy that it just obtained from the main energy source. The sun.
The ultimate source of energy for all organisms on our planet is the sun. (High-energy compounds, especially ATP, are often described as the immediate source of energy.)