Biology · Support and Movement

Rickets is a condition that primarily affects children and is caused by a deficiency in vitamin D. Vitamin D is essential for calcium and phosphate absorption in the body, which are critical for healthy bone formation. Without adequate vitamin D, bones become soft and weak, leading to symptoms such as bowed legs and stunted growth. The other options are distinct medical conditions that do not involve vitamin D deficiency or bone softening. Cleft palate is a structural birth defect, microcephaly is a condition affecting brain size, and Down syndrome is a genetic disorder.

Rickets is primarily caused by a deficiency in vitamin D, calcium, or phosphate. It leads to soft and weakened bones in children, which can result in deformities and growth retardation.

Cleft palate is a congenital condition characterized by splits or openings in the roof of the mouth. It is not related to nutritional deficiencies or bone softening.

Microcephaly is a neurological condition where a child's head is significantly smaller than normal due to abnormal brain development. It is unrelated to vitamin deficiencies or bone health.

Down syndrome is a genetic disorder caused by the presence of an extra chromosome 21. It affects intellectual and physical development but is not linked to nutritional deficiencies in vitamins.