What won't the narrator ever forget?

The cubs walked quietly in the forest of Lowachara National Park because the animals are frightened by noise.

The Nilkantha Tea Cabin sells a glass of tea of different colours and flavours.

The leaders of the cub scouts told them to be very quiet as the animals are frightened by noise.

The scouts saw a gibbon in the Lowachara National Park.

While walking quietly up a small hill, they heard a strange sound. They looked up and saw the gibbon moving quickly through the trees.

The animals get frightened when they hear any unusual noise.