Answer:
The answer is C, Species A is a predator and species B is its prey.
Explanation:
I found a random PDF earlier that has all the answers to like a hundred ecology questions and this was one of them.
the first answer as blood needs to be oxygenated to be passes round the body then when its deoxgenated it will return to the heart to be pumped around the body again
It is “B” he is Forming a hypothesis
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The cardiovascular system focuses more on pumping blood all throughout the parts of the body which mean the heart, capillaries, veins, and arteries are all involved in this. The Respiratory System is all about the gas exchange that is happening in your body which involves the lungs, oral and nasal cavities.