___________ are needed as a source of energy for the vital activities of the body?

Correct answer: D. Carbohydrates

  • A. Calcium
  • B. Iron
  • C. Water
  • D. Carbohydrates

Explanation

Carbohydrates are broken down into glucose and other simple sugars, which cells use in cellular respiration to release energy for vital activities. Water is essential for reactions and transport but does not serve as an energy-yielding nutrient, so option c is the likely misconception.

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