LISTEN & QUESTION: Handy gardeners

You can see very far here, not everything is overgrown. You see dune grassland, drifting sand and dune valleys. This is very rare in the Netherlands. To make sure it stays open, around 100 Shetland ponies walk around here. They eat dune reeds, saplings and tree bark. They also break up the soil. This allows the sand to be carried away by the wind, creating new sand dunes. Sand bees and sand beetles live in the sand and “sand plants” such as marram grass and sand seagrass grow there. This is how they protect the Sea Dunes from becoming overgrown. Handy gardeners, those Shetland ponies.

Take the 6th and 8th letters of these handy gardeners.