Answer:
Hi! Your answer here is D. environmental factor. Being unable to play tennis due to extreme heat is an example of an environmental factor because the natural heat is preventing you from playing tennis. It is not a cost or equipment factor because it has nothing to do with either category. This is also not a personality factor because, though some people may naturally deal better with heat than others, that's influenced more by their location (example: California vs. Maine) than by their personality.
B) The species would decrease in number and eventually die off.
According to the research, the correct option is the RR interval must be absolutely constant. It is a characteristic of normal sinus rhythm.
<h3>What is arrhythmia?</h3>
It implies a disorder of the rhythm that makes it not stable or regular and is caused by a failure in the electrical system of the heart rhythm, called the excitation and conduction system.
In this sense, it implies a disorder in the systole of the heart affecting the sinus rhythm that is considered normal in relation to the heart when the RR interval, which is the distance between two successive R waves, is constant, when the waves deviate from sinus rhythm, it is probable that they reveal the existence of some cardiac pathology.
Therefore, we can conclude that according to the research, the correct option is the RR interval must be absolutely constant. It is a characteristic of normal sinus rhythm.
Learn more about arrhythmia here: brainly.com/question/13095303
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Healthy people 2010 was designed to achieve two overarching goals: Increase quality of life by getting and keeping up with your health, and to eliminate health disparities.
Answer: b protein
Explanation: Hope this helps!
