Final answer:
Exposure to lead can cause a drop in IQ and impact learning, memory, and behavior in children.
Step-by-step explanation:
Exposure to lead can lead to various health effects, including damage to the nervous system and decreased IQ. According to research, blood levels of 10 mcg/dL of lead have been shown to cause a drop in IQ. Lead exposure can also result in decreased attention span, underperformance at school, and impacts on learning, memory, and behavior in children.