Answer:
Reproduction in rats, and birds differs in terms of internal/external fertilization and egg-laying mechanisms.
Comparisons between the reproduction in rats, and birds: (Similarities)
They both reproduce sexually. In both species the females give birth. They both give birth to multiple baby's at a time.
Contrasts between the reproduction in rats, and birds: (Differences)
Since rats are mammals they give birth to live offspring meanwhile birds give birth to eggs. Rats and birds both have different types of reproduction systems.
Step-by-step explanation:
In rats, reproduction is internal, which means that fertilization occurs inside the female's body.
In birds, reproduction is external as fertilization occurs outside the female's body. Female birds lay eggs which are then incubated by the parents.
In rats like most mammals, the female has separate systems including a uterus for offspring, and they give birth to live young.
Birds, use a common body opening called a cloaca for reproduction, but unlike mammals, they typically lay eggs.