This is the 11204th most frequent Polish word.
gromadzą
"Gather" or "collect."
In this sentence, 'gromadzą' conveys the action of gathering or collecting something specific, which is performed by the bees.
Pszczoły gromadzą nektar z kwiatów.
The bees gather nectar from flowers.
Here, 'gromadzą się' refers to people assembling or coming together at a location for an event.
Ludzie gromadzą się na placu przed festiwalem.
People gather in the square before the festival.
In this context, 'gromadzą' indicates the act of accumulating or collecting items, performed by the museum.