This is the 13841st most frequent Russian word.
обезьянам
The Russian word "обезьянам" means "to monkeys" (dative plural form).
In this sentence, 'обезьянам' is the dative plural form of 'обезьяна', used to indicate the indirect object receiving the action (bananas).
Мы принесли обезьянам бананы.
We brought bananas to the monkeys.
Here, 'обезьянам' is also the dative plural form, used with the verb 'дают' to indicate recipients of the action (receiving food).
Я видел, как обезьянам дают еду.
I saw how food is given to the monkeys.
In this case, 'обезьянам' is used to express the beneficiary of the liking action, represented by the verb 'нравится'.