Answer:
I Graph - obligate mutualism
II Graph - obligate parasitism
III Graph - predator and prey
Explanation:
In the first graph, the relationship between ant and the acacia tree is mutualism which means that both the species provide some form of benefit to each other.
The tree provides food and accommodation to the ants and in favor to that the ants protect the trees from herbivores.
In the second graph, sea crab gets food from the sea urchin. The crab usually sticks to the urchin and only harms it.
In the third graph, grasshopper prey upon the grass hence they have a predator and prey relationship
