What is the yellow liquid in Avatar: Fire and Ash? Amrita explained

It's not all flamethrowers and power loaders in Avatar, you know. The Way of Water first interrogated the idea that the RDA – and humans as a whole – were in search of a yellow liquid named Amrita, a valuable resource which could only be found on the planet of Pandora.Fast forward to Avatar: Fire and Ash, and Amrita is on the radar again – and even factors into the finale in a big way. So, if you need an explanation on why certain forces are fighting over the material, or just