What is one major consequence of lead exposure on a child's development?

Answer: C — Decreased IQ score

Lead exposure in children is widely recognized for its detrimental impact on cognitive development. One major consequence of lead exposure is a decrease in IQ scores. Lead interferes with brain development and functioning, particularly in young children whose nervous systems are still developing. This interference can lead to long-lasting deficits in intellectual functioning. Numerous studies have shown a clear link between elevated blood lead levels and reduced cognitive ability, as measured by IQ tests. Children with higher lead exposure often score significantly lower than their peers who have not been exposed, highlighting the serious implications of lead on child development and emphasizing the importance of preventive measures to keep environments safe from lead contamination. In contrast, the other options listed do not reflect credible outcomes associated with SAMPLElead exposure, as lead is known to impair rather than enhance emotional health, communication skills, and social interaction abilities.