How were avatars in the film avatar enslaved?

In the film "Avatar," the Na'vi, the indigenous inhabitants of Pandora, are enslaved by the human corporation RDA, which seeks to exploit the planet's resources, particularly a valuable mineral called unobtanium. The RDA employs military force and advanced technology to overpower the Na'vi and manipulate their environment. Additionally, they use the human-Na'vi avatars to interact with and control the Na'vi, furthering their agenda of subjugation and exploitation. This systemic oppression is central to the film's themes of colonialism and environmentalism.