निम्नलिखित में से किसे द्वितीयक वायु प्रदूषक के रूप में वर्गीकृत किया गया है?

In the context of chemical pollution, what specific fatal reproductive issue is caused in raptor bird populations due to the bioaccumulation of pesticides like DDT within the food chain?

In the districts of Murshidabad and Nadia in West Bengal, which of the following naturally occurring (geogenic) pollutants is found in high levels in groundwater due to sedimentary deposits?