#不同物種之間合作/競爭
#保護免受動物危害
#Cooperate/compete between different species
#Protect from animals
提供營養、住處及保護的關係 (Relationship provides nutrients, housing, protection)
牛角相思樹提供營養及住處給螞蟻，作為互利共生關係中螞蟻保護樹木免受草食性生物危害的回饋
(Bullhorn acacias provide nutrients and housing for ants in return for protection from herbivores thanks to a mutualistic relationship.)
