The correct response is: The lack of genetic diversity could mean that all of the hydras die, depending on the situation.
When conditions are difficult (such as changes in the environment, presence of diseases, or scarcity of resources), asexual reproduction, which produces genetically identical offspring (clones), can be detrimental. If the entire population has the same genetic makeup, they may all be susceptible to the same threats. In contrast, sexual reproduction increases genetic diversity, which can enhance the population's ability to adapt to changing conditions and increase the chances of survival.