Shades of blue show climate divisions that had monthly average temperatures below 50Â°F. The darker the shade of blue, the lower the average temperature. Climate divisions shown in shades of orange and red had average temperatures above 50Â°F. The darker the shade of orange or red, the higher the average temperature.
A stroma is the connective, part of a cell, organ or tissue. The  function of a stroma is to hold the cell, organ, or tissue together  and help it maintain form. Edit.
The accessory pigments broaden the absorption spectrum so that more energy is available for photosynthesis. The stroma is the fluid part of the chloroplast which contains the enzymes [enzyme: proteins which catalyse or speed up chemical reactions inside our bodies. Enzymes are a vital in chemical digestion of food in the gut] controlling the carbon [carbon: A chemical element, found in all living things.] fixation reactions.