When can contour lines touch each other

Lee is creating a garden with the dimensions shown. he creates paths through the garden along , , and . which correctly compares the lengths of the paths? the path along is longer than the path along , and the path along is longer than the path along . the path along is longer than the path along , and the path along is longer than the path along . the path along is longer than the path along , and the path along is longer than the path along . the path along is longer than the path along , and the path along is longer than the path along .

Suggest two reasons why irrigation is important for human development of the desert

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.