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.
Grana is part of the thykaloid. Each stack of thykaloid (the individual disks) are called grana. Cristae are those twisted, curving-shaped inner membranes in mitochondria where cellular respiration occur. Vacuoles stores food, waste, etc. Stroma is the fluid-like part in the chloroplast. Thykaloid is contained in the stroma.