Which disorder is characterized by a lack of iron in the body?

The correct answer is characterized by a deficiency of iron, leading to reduced hemoglobin production in red blood cells. This condition results in various symptoms, such as fatigue, weakness, and pale skin, due to the body not receiving enough oxygen delivered by the blood. Iron is essential for the synthesis of hemoglobin, and without sufficient iron, the body cannot produce enough healthy red blood cells, which directly leads to anaemia.

The other disorders listed do not relate to iron deficiency. Osteoporosis involves the weakening of bones due to a decrease in bone density and is primarily associated with calcium and vitamin D deficiencies. Hypertension refers to high blood pressure, which can be influenced by factors like diet and lifestyle but is not specifically related to iron levels. Diabetes is a metabolic disorder characterized by high blood sugar levels and is primarily related to insulin resistance or insulin deficiency rather than iron deficiency. Each of these conditions involves different dietary and physiological issues, highlighting why iron deficiency is specifically relevant to anaemia.