Answer: left subclavian vein, right subclavian vein
Explanation: The thoracic duct carrying lymph empties into a large vein which is located at the left side of the neck. Its called the left subclavian vein. Also the right subclavian vein empties into a large vein found in the right side of the neck, itz called the right subclavian vein.
DDT is biologically magnified and concentrated as it moves through the food web. This increase in concentration is due to Metabolism of DDT which excretes more slowly than the nutrients which moves from one trophic level to next. so DDT accumulates in the body especially in the Fats.