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Explanation:
1) Disease, any harmful deviation from the normal structural or functional state of an organism, generally associated with certain signs and symptoms and differing in nature from physical injury. A diseased organism commonly exhibits signs or symptoms indicative of its abnormal state
2)Deficiency diseases are diseases that are caused by the lack of certain essential nutrients, especially vitamins and minerals, in one's diet over a prolonged period of time.”
example, wheat is rich in carbohydrates, but poor in nutrients like proteins and fats.
3)Vitamin A deficiency can result from inadequate intake, fat malabsorption, or liver disorders. Deficiency impairs immunity and hematopoiesis and causes rashes and typical ocular effects (eg, xerophthalmia, night blindness). Diagnosis is based on typical ocular findings and low vitamin A levels.
Answer:
what is the meaning of this question