Question

read the passage. then answer the question. brown - headed cowbirds lay their eggs in the nests of yellow warblers or other songbirds. when a cowbird egg hatches, the warbler parents feed and raise the cowbird chick as their own. this way, the cowbird parents dont spend their own energy raising their offspring. the warbler parents spend so much time and energy raising the cowbird chick that they are not able to raise as many of their own offspring. a yellow warbler feeding a brown - headed cowbird chick which type of relationship is formed when a brown - headed cowbird lays an egg in a yellow warbler nest? commensal mutualistic parasitic

Explanation:

In a parasitic relationship, one organism (parasite) benefits at the expense of another (host). Here, brown - headed cowbirds benefit as their offspring are raised by yellow warblers, while yellow warblers are harmed as they have less resources for their own offspring. In commensalism, one organism benefits and the other is neither helped nor harmed. In mutualism, both organisms benefit. This situation fits the definition of parasitism.

Answer:

parasitic