Lets talk about space
Space is one of the seven elements of art. It refers to the area in and around a work of art.
Positive space is the area inside a subject while negative space is the area surrounding a subject or your background.
Space can also be divided into foreground, middle ground and background.

video by KQED Art School 
Please see their youtube channel for more.

-KQED (2015) Elements of Art | Space 2 Feb 2015. Available at: https://youtu.be/U11B_0FCn6o?si=dSUw8N9qm3LikDRc (Accessed: 23 September 2023).