Brominated flame retardants are used in many household products like mattresses and upholstery. Why is there some concern about their use? 1. They are highly resistant to degradation in the environment. 2. They are able to accumulate in humans and animals. Select the correct answer using the code given below.

1. Statement 1 is correct. Brominated flame retardants (BFRs), such as Polybrominated Diphenyl Ethers (PBDEs), are synthetic chemicals known for their persistence. They are highly resistant to degradation in the environment through natural processes (like microbial action, sunlight), which leads to their long-term presence and potential spread. 2. Statement 2 is correct. BFRs are lipophilic (fat-soluble) and tend to bioaccumulate. This means they can build up in the fatty tissues of living organisms, including humans and animals, over time through exposure via diet, dust inhalation (from household products like mattresses and upholstery), etc. This accumulation raises health concerns. Therefore, both persistence in the environment and the ability to accumulate in organisms are key concerns associated with the use of brominated flame retardants.