The acacia tree provides a habitat and protection for ants. this is considered its biome ecological niche ecosystem biotic factor

The acacia is considered to be in an ecological niche. This is because it plays a certain role and position for species that are around it, and in this example the ants are the ones who interact with this tree. The tree then provides it with protection for it to survive its environment. 

Ineed more info for this, i don’t quite understand what you’re asking.