Questions 34-36
Complete the sentences below.
Choose ONE WORD ONLY from the passage for each answer.
Write your answers in boxes 34-36 on your answer sheet.
34 dune is said to have long ridges that can extend hundreds of miles.
According to Bagnold, an 35 is needed to stop the sand from movingbefore a dune can form.
Stéphane Douady believes the singing
of dunes is not a spiritual
phenomenon, but purely 36 .