Which of the following would be an example of "-scopy"?

The suffix "-scopy" refers to a procedure that involves looking into or examining the interior of a body cavity or organ using a specialized instrument, often referred to as a scope. In the case of bronchoscopy, it specifically denotes the examination of the bronchial tubes and lungs using a bronchoscope. This procedure allows healthcare professionals to visualize and diagnose respiratory conditions or issues within the airways.

The other options do not involve an examination or visual inspection in the same manner. A blood test analyzes blood samples but does not use a visual scope. Measuring heart rate involves the use of electronic devices or manual counting rather than a visual examination. A CT scan is an imaging technique that captures cross-sectional images of the body but does not involve direct visualization through a scope, which is central to the definition of "-scopy." Thus, bronchoscopy is the only choice that embodies the essence of this suffix.