лес

In a sentence

• Я гулял по густому лесу.

  I was walking through the dense forest.

  Here, 'лес' refers to a natural area covered with trees, serving as the locative case usage.

• Он купил деревянный домик на краю леса.

  He bought a wooden cabin on the edge of the forest.

  In this sentence, 'лес' signifies a distinct geographical or topographical feature.

• На уроке географии мы изучали тайгу и другие виды лесов.

  In geography class, we studied the taiga and other types of forests.

  This reflects the plural form 'лесов', showcasing its use in an academic or descriptive context.