Final answer:
A preschooler with plumbism is prone to committing violent acts as a teenager due to developmental delays, lower IQ, and behavior problems caused by early lead exposure.
Step-by-step explanation:
Many researchers believe that a preschooler with plumbism (lead poisoning) is prone to committing violent acts as a teenager. Lead exposure in infants and young children can result in serious health effects including developmental delays, lower IQ, hyperactivity, and behavior and learning problems. These health issues not only impact a child's early development but also have long-term consequences that can manifest in various ways, such as an increased risk of violent behavior in later years.