Question

what is the hurmomful living thing​

Answer 1

Answer:

Trace essential elements such as fluorine, copper, selenium and others can be hazardous to living organisms if present at high levels. Nonessential heavy metals such as arsenic, lead, mercury, cadmium and chromium are usually toxic to organisms at much lower levels than trace essential elements.

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Answer 2

Question = What is harmful to living things?

Answer = Trace essential elements such as fluorine, copper, selenium and others can be hazardous to living organisms if present at high levels. Nonessential heavy metals such as arsenic, lead, mercury, cadmium and chromium are usually toxic to organisms at much lower levels than trace essential elements.