Here's the matching of descriptions to pictures:
- Description 1 ('There's a river in the forest.') matches with picture B.
- Description 2 ('In this garden there is grass, and there are trees and flowers.') matches with picture D.
- Description 3 ('Here we can see the sea and the beach.') matches with picture A.
- Description 4 ('This is the countryside near my home.') matches with picture C.