The correct response is: The lack of genetic diversity could mean that all of the hydras die, depending on the situation.
In difficult conditions, hydras might avoid asexual reproduction because it leads to offspring that are genetically identical to the parent. This lack of genetic diversity can make the population vulnerable to diseases or environmental changes that could affect all individuals equally, potentially leading to the extinction of the population. Sexual reproduction, on the other hand, increases genetic diversity, which can enhance the chances of survival for some individuals in changing or challenging environments.