'Invasive Species Specialist Group' (that develops Global Invasive Species Database) belongs to which one of the following organizations?

Answer: A. The Invasive Species Specialist Group (ISSG) belongs to the International Union for Conservation of Nature (IUCN). The ISSG is one of the Specialist Groups of the IUCN's Species Survival Commission (SSC). It is a global network of scientific experts focused on invasive alien species. The group develops and maintains the Global Invasive Species Database (GISD), an authoritative open-access resource containing information on invasive species worldwide. The IUCN Red List of Threatened Species is also maintained by the SSC, illustrating IUCN's central role in global biodiversity assessment. Distractors: (B) UNEP runs broader environmental programmes but does not host the ISSG. (C) The UN World Commission on Environment and Development (Brundtland Commission, 1987) produced 'Our Common Future' but is not an active institution. (D) WWF is a separate conservation NGO; it works on species but does not house ISSG. Source: IUCN Species Survival Commission / Global Invasive Species Database (GISD) site.