Negative space composition is a composition where we make the main object in a small part so that the background (negative space) gets a bigger part and becomes the attention drawer in the photo. Negative space can make our eyes rest with the dominant empty space. The use of this composition can be a unique attraction and provide balance in the composition. Apart from that, negative space can show certain emotions and feelings and give a dramatic impression, thus strengthening the meaning of the photo. As in the photo below:
Source : https://www.hongkiat.com/blog/positive-effect-of-negative-spaces-in-photography/
Negative space in the image can strengthen the impression of humor in the photo.
In this photo, we can see the background of the sky and grassland becoming negative space with the main object of the child who is jumping very high. This photo can convey the impression of the child's happiness.