Final answer:
Allomothers help to care for infants because it increases the chances of the infants' survival. In many species, including birds and mammals, one or both parents provide parental care to their offspring, and allomothering, where individuals other than the parents help with infant care, benefits the infants by providing additional support and resources.
Step-by-step explanation:
Allomothers help to care for infants because it increases the chances of the infants' survival. In many species, including birds and mammals, one or both parents provide parental care to their offspring. This care may include feeding, protecting, and teaching the young. Allomothering, where individuals other than the parents help with infant care, benefits the infants by providing additional support and resources, allowing the parents to allocate their energy to other tasks.