Ddt, dde, pcbs and pbdes are all , dde, pcbs and pbdes are all biodegradable and do not persist in the environment btoxic at the organism level but not at the ecosystem level c teratogens non-biodegradable and subject to bioaccumulation and/or bioamplification dapproved for use as pesticides by the epa

The answer is non-biodegradable and subject to bioaccumulation and/or bioamplification.

DDT () is persistent, non-degradable insecticide and organic pollutant readily accumulated to soils and consequently affects organisms.
DDE () is non-degradable pesticide toxic to birds at the first place.
PCBs (polychlorinated biphenyls) are non-degradable organic compounds  very toxic to the environment.
PBDEs (polybrominated diphenyl ethers) are non-degradable compounds very toxic to environment, even able to affect brains of animals in the development period.

Elias is almost correct. he just got it backwards.the correct answer is that it demonstrates elastic potential energy transforming into kinetic energy.