Final answer:
The interaction between buffalos and cowbirds, with cowbirds eating insects activated by the buffalos' movement, is an example of commensalism, a symbiotic relationship where one species benefits and the other is unaffected.
Step-by-step explanation:
The relationship between buffalos and cowbirds as described is an example of commensalism. In this interaction, the cowbirds benefit by getting more access to insects to eat as the buffalos disturb them while walking through the grass. The buffalos, on the other hand, are unaffected by this activity. Commensalism is a type of symbiotic relationship where one species benefits while the other is neither harmed nor helped.