Taken from Wiki:
a manifold is a mathematical space that on a small enough scale resembles the Euclidean space of a specific dimension, called the dimension of the manifold. Thus, a line and a circle are one-dimensional manifolds, a plane and sphere (the surface of a ball) are two-dimensional manifolds, and so on into high-dimensional space.
A sphere is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball.
The Attempt at a Solution
The dimensions of a manifold are=n-1 dimensions of shapes and objects of reality?