Fact 1: Poison causes harm to living things.

Fact 2: Arsenic compounds are poisonous.

Given the two facts above, answer the question "What causes harm to living things?" with the following options: 
- arsenic compounds
 - a pathogens
 - tapeworms
 - deforestation
 - deoxyribonucleic acid
 - Pesticides
 - cigarettes
 - fossil fuels


 

 arsenic compounds        