Wikipedia states:

Sometimes due to specific combinations of properties extended objects behave as point-like even in their immediate vicinity. For example, spherical objects interacting in 3-dimensional space whose interactions are described by the inverse square law behave in such a way as if all their matter were concentrated in their centers of mass. In Newtonian gravitation and classical electromagnetism, for example, the respective fields outside of a spherical object are identical to those of a point particle of equal charge/mass located at the center of the sphere.

Can you please explain/elaborate more on this? Are they saying, for example, that a source which has a flux emanating from it can be treated as a point particle, even if it's spherical?

How can spatially extended objects behave like point particles?

Thank you.