Question

1. why do
humans usually give birth to just one offspring
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Answer 1

Answer:

Fine-tuning the most basic survival skills, such as walking and feeding themselves, takes at least another year or more, and the little ones generally remain dependent on parents or caregivers for well over a decade before they're even able to begin to navigate parts of the world on their own.

Answer 2

baby requires too much calcium and other useful products from his mother body all these useful elements will finish in mothers body then it will leads to mother death