Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:latter phenotypes are called competitive adaptations and include (i) strategies to take away resources from competitors (exploitative competition), for example by fast-butwasteful-growth [26], production of nutrient-scavenging molecules [27], or superior positioning within the niche [28], and (ii) strategies to directly fight with competing species (interference competition), for example by production of antimicrobials [29] or contact dependent inhibition [30, 31].
Category: