Which one is non-biodegradable?

1. DDT (Dichlorodiphenyltrichloroethane) is a pesticide that is not biodegradable, meaning that bacteria cannot break it down. 
2. It is a crystalline, colorless, and odorless substance that was widely employed as an insecticide before its negative effects on the environment were discovered. 
3. Due to the fact that DDT is a fat-soluble substance, it has been found to be extremely persistent in the environment. 
4. It entered the aquatic food chain and led to biomagnification, according to studies. The destruction of the soil microbial fauna was seen as a result of its easy absorption by soil particles. It evaporates and lingers in the atmosphere as a contaminant. 
5. It is a non-biodegradable substance as a result.

Hence, option D is the correct answer.