Problem: Given the question: Determine the topic of the passage. "Heart rate can vary as the body's need to absorb oxygen and excrete carbon dioxide changes, such as during physical exercise , sleep , illness, or as a result of ingesting drugs :" Topic:
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The answer is:
Heart rate


Problem: Given the question: Determine the topic of the passage. "Informal logic, intuitively, refers to the principles of logic and logical thought outside of a formal setting." Topic:
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The answer is:
Informal logic


Problem: Given the question: Determine the topic of the passage. "In photography , bracketing is the general technique of taking several shots of the same subject using different camera settings." Topic:
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The answer is:

Bracketing