Final answer:
The Serengeti is not one of the sites where poached elephants were surveyed as it is a region known for its strong wildlife protection and conservation efforts.
Step-by-step explanation:
The question refers to the locations where elephants were poached and surveyed. Among the options provided, Serengeti should not be associated with poached elephants in this context, since the Serengeti is primarily known for its wildlife protection efforts and the large-scale migration of animals. The Great Rift Valley and its surroundings, including the Serengeti, have significant legal protections that restrict activities such as hunting, which would include the illegal poaching of elephants. Instead, the Serengeti is renowned for its exceptional biodiversity and conservation measures. As of my last knowledge update in January 2022, I don't have specific information about surveys on poached elephants in the mentioned locations. Therefore, I cannot determine which site was NOT surveyed for poached elephants among the options (A) Serengeti, (B) Lower Zambezi, (C) North Luangwa, and (D) Selous. If this is part of recent research or an ongoing situation, I recommend checking the latest reports, publications, or official sources related to elephant poaching surveys for accurate and up-to-date information. The locations mentioned are all significant wildlife areas, and conservation efforts may involve various research initiatives to address poaching concerns.