Answer:
Social sciences: a definition
<h2>The major social sciences are Anthropology, Archaeology, Economics, Geography, History, Law, Linguistics, Politics, Psychology and Sociology.</h2>
<span> Blood flow to the </span>heart<span> is blocked its known as a heart attack, this is due to circulatory problems.
C</span>ardiac arrest<span> is when the heart stops completely and all of a sudden unlike a heart attack its known to be an e</span><span>lectrical problem.
Someone having cardiac arrest and are unresponsive, would need to be shocked by </span><span>defibrillator, whereas if someone is having a hear attack you will need to put them into recovery position and do CPR.</span><span>
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Answer: The answer is variable.
Explanation: Scientists may do a start out hypothesis on the info they have. But if something changes in that experiment, it is the Variable.
Hope this helps!