Answer:
There is a breeze blowing.
Step-by-step explanation:
This is a scene-setting descrubing a walking trail, a park, a garden along a sidewalk. Daffodils bloom in the very earliest part of Spring; late February, early March. That they are "nodding" their heads could mean there's a soft breeze blowing. That there are walkers means it's probably a temperate, sunny day. And that's DAY rather than night - probably early morning or noon time, when people like to walk.