Okay, kiddo. So think about bees and flowers. You know how bees go from flower to flower to collect pollen? Well, when they do that, they end up spreading pollen from one flower to another. And when that happens, it can help the plants make new seeds and grow more flowers.
But here's the thing: some plants are better at attracting bees than others. And some bees are better at collecting pollen than others. So over time, the plants that are really good at attracting bees and getting their pollen spread around end up making more seeds and growing more flowers. And the bees that are really good at collecting pollen from those plants end up having more babies and passing on their bee genes.
This is called pollinator-mediated selection. Basically, it's when the way that bees and flowers interact ends up shaping which plants and bees survive and reproduce. It's like a really slow dance between the plants and the bees, and over time they both get better at what they do.