Final answer:
E-waste recycling disposes of toxic heavy metals, specifically lead and mercury, which pose health risks to workers in under-regulated regions.
Step-by-step explanation:
E-waste recycling is tasked with the disposal of various toxic heavy metals. The correct answer to the question about which toxic heavy metals are disposed of through e-waste recycling is A. Lead, Mercury. These substances, along with others such as cadmium, can pose serious health risks to those exposed to them without proper safeguards. E-waste often contains valuable materials as well, including copper, silver, and gold, but these are not considered toxic in the context of this question. Unfortunately, in the process of extraction in under-regulated regions, workers come into contact with hazardous substances, which can lead to a range of health issues.