Answer:
B
Step-by-step explanation:
a plant living in a dry region means it will need to have less stomata on the upper surface of the leaf than the bottom to save as much water as possible since a more drier region lacks water, so look for a plant that has the least number of stomata on the upper surface - B
it has no stomata on the upper surface of the leaf which means less water loss through the stomata via transpiration