Question

PART I: Choose the letter of the correct answer
1. Which of the following substances is an element?
A. Air
B. Iron
C. Salt
D. Sugar
2. Elements play an important role in the human body. Which of the following is CORRECTLY paired?
A. SODIUM - maintain regular heart beat
B. POTASSIUM - antioxidant
C. IRON - relaxation of muscles
D. CALCIUM - formation and maintenance of bones and teeth​

Answer 1

Answer:

PART 1: B (IRON)

PART 2: D(CALCIUM- formation and maintenance of bones and teeth