I believe the answer in here would be the law of multiple
proportions. The law states that whenever the same two elements merge to create
more than one compound, the different masses of one element that merge with the
same mass of the other element have a ratio that is in whole numbers.
Answer: This is because, the stem symbolises the bronchioles of the lung through which oxygen is transfered to the lungs. The grabes represent the lungs, left and right respectively.
