Question

what are synthetic chemicals?
living things that can cause mutations
chemicals found in products that can cause mutations
chemicals that are contaminated with bacteria

Explanation:

Synthetic chemicals are man - made substances. The first option refers to living things (not chemicals). The third option about contamination with bacteria is not the definition of synthetic chemicals. The second option correctly describes synthetic chemicals as chemicals (man - made, so found in products) that can cause mutations (a property of some synthetic chemicals).

Answer:

chemicals found in products that can cause mutations