The correct answer is C. Lead.
Lead is a heavy metal that is toxic to humans and other animals. It can be found in the air, water, soil, and food. Lead pollution can cause a variety of health problems, including brain damage, learning disabilities, and reproductive problems.
Lead is released into the air from a variety of sources, including gasoline combustion, industrial emissions, and lead-based paint. Once in the air, lead can be transported long distances by wind and rain. It can then be deposited in soil and water, where it can be ingested by plants and animals.
Lead can also be ingested by humans through the inhalation of lead-contaminated dust or the consumption of lead-contaminated food or water. Lead can accumulate in the body over time, and even low levels of exposure can have harmful effects.
There is no safe level of lead exposure. Children are especially vulnerable to the effects of lead, as their brains and nervous systems are still developing. Lead exposure can cause a variety of developmental problems in children, including learning disabilities, attention deficit hyperactivity disorder (ADHD), and behavioral problems. Lead exposure can also cause reproductive problems in women, including miscarriage, premature birth, and low birth weight.
Lead poisoning can
be prevented by reducing exposure to lead. This can be done by removing lead-based paint from homes and businesses, using lead-free gasoline, and testing children for lead exposure.If you are concerned about lead exposure, you should talk to your doctor. You can also get more information about lead poisoning from the Centers for Disease Control and Prevention (CDC).