Female birds lay their eggs, thereby facilitating flight by reducing weight. Which "strategy" seems most likely for female bats to use to achieve the same goal?

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Quizplus · Accepted Answer

Bats, being mammals, do not lay eggs. To reduce weight and facilitate flight, female bats often limit their litters to a single embryo, which allows them to remain agile and efficient in the air while pregnant.

Female Birds Lay Their Eggs, Thereby Facilitating Flight by Reducing