What is meant by The daffodils nodded their yellow heads at the walkers?

The phrase "The daffodils nodded their yellow heads at the walkers" personifies the flowers, suggesting they are alive and interacting with the people passing by. This imagery evokes a sense of warmth and friendliness in nature, as if the flowers are welcoming or acknowledging the walkers. It conveys a feeling of beauty and tranquility in the natural world, enhancing the overall mood of the scene.