Why can't a female lizard have both high fecundity and high survival?

Question

Quizplus · Accepted Answer

The more energy a female lizard devotes to producing offspring, the less energy she has for her own survival. Thus, it is difficult for a female lizard to have both high fecundity (the ability to produce many offspring) and high survival. This is because producing and caring for offspring requires a lot of energy and resources, which can be at the expense of the mother's survival. Therefore, it is more common for lizards to have either high fecundity or high survival, rather than both.

Why Can't a Female Lizard Have Both High Fecundity and High