In an ecosystem where the average temperature increases and winters become shorter, the scenario that is most likely to occur is:
A) The proportion of white-furred rabbits in the population declines.
This is because white-furred rabbits are typically better adapted to snowy environments where their fur color provides camouflage against predators. As winters shorten and the snow cover decreases, the advantage of having white fur diminishes, making brown-furred rabbits more likely to survive and reproduce in these warmer conditions. Therefore, the proportion of white-furred rabbits is likely to decline in favor of the better-adapted brown-furred rabbits.