Which is more efficient, a three chambered or four chambered heart? Why? ​

Explanation:

A four-chambered heart keeps oxygenated and deoxygenated blood separated and has double circulation whereas a three-chambered heart has a single circulation. This assists in more efficient movement of oxygen around the body.

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The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )