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(A) An evolutionary stable strategy $(ESS)$ is a strategy which,if adopted by a population in a given environment,cannot be invaded by any alternative

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$1000$: $1000$

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(A) An evolutionary stable strategy $(ESS)$ is a strategy which,if adopted by a population in a given environment,cannot be invaded by any alternative strategy that is initially rare.In sexual reproduction,a sex ratio of $1:1$ (equal number of males and females) is considered the most common $ESS$.This is because,in most species,each offspring requires an equal investment from both parents,and a $1:1$ ratio maximizes the reproductive success of both sexes.Among the given options,$1000: 1000$ represents a $1:1$ ratio,which is the most stable evolutionary strategy.

Following are sex ratios obtained from a given area. Which one will show an evolutionary stable strategy between males and females respectively?

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