What are the difference between low-order, medium order and high-order goods and service

Low-order products are products that are repeatedly purchased and are low-priced while Middle-order products are time-to-time items that are purchased but not as often as low-order products. Also, High-order products are the most expensive items or have a limited market and are scarcely purchased.

the correct answer is blue and green.

a visible spectrum is electromagnetic spectrum color that can be seen by a normal human being by a single wavelength of light. the visible light spectrum is the range of wavelengths that make up visible light. the visible light spectrum passes through a prism enabling the rainbow reveals all the colors in the spectrum. these range from red, orange, yellow, green, blue and violet.