This is the 18150th most frequent Russian word.
цветками
"Цветками" means "flowers" (instrumental plural form).
In this sentence, "цветками" is used in the instrumental case to indicate that the bouquet is adorned using flowers.
Букет был украшен цветками роз.
The bouquet was decorated with rose flowers.
Here, "цветками" is also in the instrumental case, but emphasizes interaction or relation with the flowers being observed.
Я рассматриваю цветками, которые растут в саду.
I am examining the flowers that grow in the garden.
In this example, "цветками" implies the source, contributing to the instrumental case usage in depicting the relationship between bees and flowers.