True or false: Crickets who lack ridges to make their singing sound are more likely to survive on the island.

To answer this question, we need more context. The survival of crickets on an island could depend on various factors such as predators, availability of food, climate, etc. If the ridges used for singing attract predators, then it could be true that crickets without these ridges have a higher survival rate. However, if the singing is used for mating and attracting a mate, then crickets without these ridges could have a lower survival rate due to reduced reproduction. Without specific information about the island's ecosystem and the role of cricket singing in it, we cannot definitively answer this question.