You can also find photosynthesis, the carbon cycle, the water cycle and others
Answer: The Pulmonary vein blood vessel carries oxygenated blood from the lungs back to the heart. Therefore, it carries the highest concentration of oxygen.
Explanation: i think is the answer not sure hope it help this question :)
Answer:
C
Explanation:
Parasitism is a relationship between two different organisms where the parasite harms the host.
Answer:
Survey
Explanation:
Because if you think about it carefully you really cant observe it. Your main goal is to compare them and with that we need a survey to get the data from both sides. Leaving us with the Survey
