The correct answer is D. Aluminium.
Mercury, arsenic, and lead are all heavy metals that are toxic to humans and other animals. They can be found in the environment as a result of natural processes, such as volcanic eruptions, or as a result of human activities, such as mining and smelting. These metals can accumulate in the body and cause a variety of health problems, including neurological damage, reproductive problems, and cancer.
Aluminium is a light metal that is widely used in construction, packaging, and electronics. It is not considered
to be a pollutant, although it can be released into the environment from mining and smelting operations. However, the levels of aluminium in the environment are generally considered to be safe.In conclusion, the correct answer is D. Aluminium. Mercury, arsenic, and lead are all heavy metals that are toxic to humans and other animals, while aluminium is not.