Radiation is responsible for the greatest loss of energy.
I believe your answer would be the stem.
Foods rich in iron include:
Red meat, pork and poultry.
Seafood.
Beans.
Dark green leafy vegetables, such as spinach.
Dried fruit, such as raisins and apricots.
Iron-fortified cereals, breads and pastas.
Peas.
Water molecules are polar. This means that one end of the molecule is positively charged, while the other is negatively charged. Opposite charges attract. Water molecules on the faucet that are eventually pulled away from the others by gravity will themselves pull together and form round drops because the charged portions of molecule attract the oppositely charged portions of another.