Final answer:
The species-species interaction between Pseudomyrmex ants and the bullhorn acacia plant is mutualism.
Step-by-step explanation:
The best term to describe the species-species interaction between Pseudomyrmex ants and the bullhorn acacia plant is a. mutualism.
This is a mutualistic relationship, where both species benefit from their interaction. The tree supports the ants by providing shelter and food, while the ants protect the tree from herbivores and remove potential pathogens. The ants also help in pollination by not interfering with insect pollinators.
The best term to describe the species-species interaction between Pseudomyrmex ants and the bullhorn acacia plant would be mutualism. This mutualistic relationship involves both species receiving benefits: the ants gain shelter and food, while the acacia plant receives protection from herbivores and pathogens.