Europe is the most likely answer.
Answer:
An organism would need a 4 chambered heart.
Explanation:
The heart consists of 4 chambers in which blood flows freely. Right atrium, left atrium, left ventricle and right ventricle.
The pulmonary arteries carry de-oxygenated blood to the lungs from where CO2 is released and O2 is picked up during the process of respiration. The pulmonary vein then takes the oxygenated blood to the left atrium of the heart and then to the left ventricle of the heart.
Answer:
B: The Engine
Explanation:
I choose that because it has the most energy throughout the train
I believe your pointing to number 16, I believe the answer is B
C. Solids.
Because for what i know, particles of a solid are hard to separate as there are strong intermolecular forces holding them together
