This is the 4620th most frequent Russian word.
деревья
Trees.
Here, 'деревья' is used as the subject of the sentence, highlighting their role in creating scenery.
Деревья вдоль дороги создают красивую аллею.
The trees along the road create a beautiful avenue.
'Деревья' would describe plural cases, but here we use 'дерева' as singular or countable nouns. This indicates specific instances of trees within a context.
Мы посадили два молодых дерева в парке.
We planted two young trees in the park.
The word 'деревьев' is in the genitive plural form, showing possession or association of the leaves with the trees.