Which type of person is identified as an IDP?

An internally displaced person (IDP) is specifically defined as an individual who has been forced to flee their home but remains within the borders of their own country. This situation often arises due to conflict, violence, human rights violations, or natural disasters. IDPs face many of the same dangers as refugees, yet their situation is distinctly characterized by their continued presence within their national boundaries, which distinguishes them from those who cross international borders in search of safety.

The other options describe different situations and categories that do not align with the definition of an IDP. For example, individuals who live abroad for work are expatriates, and refugees are individuals who cross international borders seeking asylum from persecution or violence in their home countries. Foreign aid workers are professionals involved in humanitarian assistance but do not belong to the category of displaced persons. Thus, the correct identification of an IDP focuses solely on the context of internal displacement within one's own country.