Question

All living things contain which element?
A. Helium
B. Sodium
C. Copper
D. Carbon

Answer 1

Sodium because most animals have salts in them. Salt contains sodium

Answer 2

Carbon serves as main component, hydrogen is usually attach to carbon to form the organic compound, oxygen is also important, nitrogen to form the protein of living things, iron is important for human, calcium for the bones other elements are present as trace element like zinc, potassium and iodine

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