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Most people living in hilly regions suff...

Most people living in hilly regions suffer from goitre. Give reason.

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### Step-by-Step Solution: 1. **Understanding Goiter**: Goiter is defined as the swelling of the neck due to an enlarged thyroid gland. It is important to recognize that this condition is visible externally and is associated with thyroid health. 2. **Causes of Goiter**: The primary cause of goiter is iodine deficiency. Iodine is a crucial element required for the production of thyroid hormones. Without adequate iodine, the thyroid gland cannot function properly. 3. **Iodine in Diet**: Iodine must be obtained through diet, as the body does not produce it. Foods such as seafood, dairy products, and iodized salt are common sources of iodine. ...
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