Question

what are contours please tell I m waiting fastttt

Answer 1

contours are related to topography
Contour are imaginary lines joining places which have same height above mean sea level.

Answer 2

The contour is defined as a line (is also referred to as isocline, isopleth, isarithm, or equipotential curve) —  of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value.

Usually it is a plane section of the three-dimensional graph of the function f(x, y) parallel to the x, y plane. I