Question

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

Explanation:

Synthetic chemicals are man - made substances. The first option describes chemicals that can cause mutations (mutagens), which is a property that some synthetic chemicals may have. The second option about bacteria - contaminated chemicals is about contamination rather than being synthetic. The third option refers to living things (not chemicals).

Answer:

chemicals found in products that can cause mutations