This is the 5104th most frequent Russian word.
наблюдением
"Observation."
In this sentence, 'наблюдением' is used as a noun in the instrumental case, indicating the activity of observing.
Мы занялись наблюдением звезд на ночном небе.
We engaged in observing stars in the night sky.
'наблюдением' functions as a noun in the instrumental case, referring to the action or result of observing animals.
Его наблюдением за животными в дикой природе восхищаются многие.
Many admire his observation of animals in the wild.
Here, 'наблюдением' is used as a noun in the instrumental case, emphasizing the process of monitoring or noting the progress.