Systematics is the study of the units of biodiversity. Systematics differs from ecology in that the latter is concerned with the interactions of individuals (and therefore species) in a particular time.
Its important not to put a person making an emergency call on hold because since it might be a patient who is a serious case and might lose consciousness. It is therefore always important to obtain the name, phone number, and location at the start of the call so that the patient can be found if they lose consciousness or is disconnected. Additionally its is important to make sure one stays connected with the patient until help arrives to ensure their safety.
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The answer is near the equator. Hope that helps!