18. As long as the little owls remain in the nest, they’re completely dependent ontheir parents for food. The problem is that the smallrodents that they eat can’t be split up. When Mom or Dad returns to the nest to feedtheir offspring, only one chick can eat a time.In many bird species, the oldest would simply outcompete the youngest, but barnowls are different. __________ Younger owlets groomed older ones more oftenthan older ones groomed the youngsters. And in return, the older owlets fed theiryounger siblings. In addition, older owlets preferentially offered food to theirhungriest siblings, even in the absence of grooming.
(A)It's mainly observed when males want to reproduce with females, so thereare many exchanges of food.
(B) Food sharing only happened when the researchers artificially provisioned theowlets with extra food.
(C) It is rarely observed and quite impressive that in this species, there are somany cooperative behaviors in chicks.
(D)Remarkably complex examples of cooperation can be found among animalsiblings, and even newly hatched barn owls know. that sharing is caring.