Which of the following groups is considered a pollinator?

Bees are considered a vital group of pollinators due to their specific role in the fertilization process of plants. They actively collect pollen and nectar from flowers, which is essential for plant reproduction. During this process, as bees move from flower to flower, they transfer pollen, facilitating the fertilization of flowering plants and allowing them to produce fruits and seeds. This interaction not only supports the plants’ reproductive cycles but also plays a critical role in the ecosystem by promoting biodiversity and providing food resources for other species.

In contrast, earthworms do not engage in pollination activities; they mainly contribute to soil health and structure. Bats can help pollinate certain plants, particularly in tropical regions, but they are not as universally recognized for their pollination utility as bees. Similarly, frogs do not perform pollination; they are more known for their roles in the food chain and pest control. Thus, bees distinctly stand out as one of the most effective and recognized groups of pollinators, which justifies their selection as the correct answer.