Its the letter B because its the circulatory system
The correct answer is C. "when Henry ask "what is different with this plant that does not grow very well compared with the other house plants?" "
<span>the plant no longer is allowing the necessary carbon dioxide required for photosynthesis to enter through the stomata. The plant also needs to be able to release oxygen,the byproduct of photosynthesis through the stomata. The stomata are also responsible for theamount of water inside the plant. By closing when there is not enough water, the stomata prevent loss of additional water due to evaporation.</span>
Amphibians, birds, and mammals look the most similar as embryos.
