For Iron:

For Oxygen:

These are the two chemical symbols for the two elements found in Iron Oxide.
This is not chemistry but it's A, off top.
..........The answer is B
Answer is "sucrose".
Polymer is a large molecule which is made from repeating units. The smallest repeating unit is called as monomer. <span>Polystyrene, nylon and PVC are examples for polymers. But sucrose is a disaccharide which is made from glucose and fructose. Hence, sucrose is not an example of polymer. </span>
The motion of its particles determines an objects thermal energy.