* Mutualism: This is a relationship where *both* organisms benefit. For example, bees pollinating flowers - the bees get food, the flowers get pollinated.
* Birds and Elephants: While they often interact, the benefit isn't always mutual.
* Birds benefit from elephants: Birds often eat parasites and ticks off elephants, getting a meal. They may also eat seeds and fruits dropped by elephants.
* Elephants may or may not benefit: Some argue that the birds help keep them clean, but it's not a crucial necessity for the elephant's survival.
So, the relationship is closer to Commensalism where one organism benefits (the bird) and the other is neither harmed nor helped (the elephant).
It's important to remember that nature is complex, and there might be nuances in specific cases.