Correct Answer: Iodine

Solution : The correct option is Iodine.

Iodine is abundant in sea weeds, commonly known as marine macroalgae. They absorb and concentrate iodine from saltwater, giving them a natural iodine store. Iodine is accumulated by sea weeds in iodine-rich marine habitats via metabolic activities. Iodine may be recovered from these seaweeds once they have been collected and processed. The extracted iodine can subsequently be employed in a variety of applications such as nutritional supplements, medicines, and industrial uses.