Iron-deficiency anemia often causes symptoms ofMultiple Choicefatigue.night blindness.dental decay.dermatitis.

In the context of iron-deficiency anemia, the most relevant symptom from the options provided is fatigue. Iron is essential for the production of hemoglobin, which carries oxygen in the blood. When iron levels are low, the body struggles to transport adequate oxygen, leading to feelings of tiredness and weakness.

• Fatigue: This is the most common symptom of iron-deficiency anemia due to insufficient hemoglobin levels.
• Night blindness: Typically related to vitamin A deficiency rather than iron deficiency.
• Dental decay: Not directly linked to iron deficiency, though overall health can influence oral health.
• Dermatitis: While some deficiencies can cause skin issues, it is not a primary concern with iron-deficiency anemia.

Therefore, the correct answer is fatigue.