Question

what do you mean by negative and positive space in painting class 10​

Answer 1

Answer:

Positive space refers to the subject or areas of interest in an artwork, such as a person's face or figure in a portrait, the objects in a still life painting, or the trees in a landscape painting. Negative space is the background or the area that surrounds the subject of the work.

Answer 2

Negative space, in art, is the space around and between the subject(s) of an image. Negative space may be most evident when the space around a subject, not the subject itself, forms an interesting or artistically relevant shape, and such space occasionally is used to artistic effect as the "real" subject of an image.
Whereas......

Positive space is any part of the photo that jumps out from its surroundings. That includes your subject, for example, along with other noteworthy areas of detail. Negative space is just the opposite — parts of an image that don't attract as much attention, surrounding the positive space and giving it a buffer.