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Animals Reproduction involves the biological process by which animals produce offspring. This complex process typically involves the fusion of male and female gametes to form a zygote, which eventually develops into a new individual. Reproduction in animals can occur through various mechanisms such as sexual reproduction, asexual reproduction, internal fertilization, external fertilization, oviparous reproduction, viviparous reproduction, and ovoviviparous reproduction. The specific reproductive strategies vary among different animal species, depending on factors such as environmental conditions, life history traits, and evolutionary adaptations.