So here,
Sam, Sally and John are on the boat and are sailing to find a island.Suddenly the motor stops working. They all were worried. Sally started crying because the boat was not moving. After that they see a mountain. And decides to Swim till there.
Answer:
It is thought that a history of genetic relatedness among some parents combined with intermarriage on the island ,contributed to the spread of the genetic defect that caused vineyard deafness ... Individuals with vineyard deafness used a highly developed sign language ,probably based on a Language brought from Kent
