definitions

grayscale-s an image in which the value of eachpixel is a single sample, that is, it carries only intensity information. 
rdb color-s an additive color model in which red, green, and blue light is added together in various ways to reproduce a broad array of colors. 
cmyk color-is a subtractive color model, used in color printing, and is also used to describe the printing process itself.
lab color-is a color-opponent space with dimension L for lightness and a and b for the color-opponent dimensions, based on nonlinearly compressed CIE XYZ color space coordinates.

what could i do with the image provided in lab 2

with the picture provided in lab 2 i could make it as a food chain and with those ingredients a could make a pasta with a salad and fruits as a dessert