Lipids would be the answer that you are looking for. When talking food energy it's best to speak in terms of calories. Therefore, lipids or fats offer the greatest amount of heat or energy.
It is A
Since radiant energy is energy that travels through waves, <span>particularly electromagnetic radiation (</span>heat or x-rays)<span>, then it has to be radiant energy. Mechanical energy is used to move objects such as that of a turbine.</span>
I don't know the real answer because you didn't attach the choices, but Adenine (A) is always paired with Thymine(T) and Guanine (G) is always paired with Cytosine (C).
Greenhouse gases, such as carbon dioxide (CO2), trap heat from the Sun. This causes the Earth's climate to grow warmer, resulting in "global warming".