________ is a rich source of iodine.

Correct option is D

The correct answer is (D) Seafood

Explanation:
• Seafood, especially seaweed, fish, and shellfish, is naturally rich in iodine because they absorb the mineral from seawater.
• Iodine is an essential micronutrient required by the thyroid gland to produce hormones that regulate metabolism and growth.

Information Booster:
• Most of the world's iodine is found in the ocean.
• Common sources include kelp, cod, shrimp, and iodized table salt.

Additional Knowledge:
• Refined sugar (Option A): Contains no minerals or vitamins.
• Wheat (Option C): A good source of carbohydrates and fiber but very low in natural iodine.