Why have researchers not found a one time vacanation for the flu

Asap many people try to eliminate fat from their diets which is one reason it is necessary for humans to eat fat a) fat is the only way to get energy b) every cell in the body must contain fat c)fat stores less energy than polysaccharides d) saturated fats make blood vessels healthier

What statement about energy is true

When you exhale, air in you lungs moves from the does anyone know the correct answer on apex