Question

the transit method of finding exoplanets is the only reliable method used to detect exoplanets. requires sensitive cameras that can monitor the varying brightness of a star as a planet passes in front of it. detects exoplanets by measuring the doppler shift of the planets star. a disadvantage of the transit method compared to other methods of searching for exoplanets is that it depends on an unrepeatable, chance event. it is unable to detect exoplanets about the size of earth. an exoplanets orbital plane must be nearly edge - on relative to the line of sight of the observer to be detected.

Explanation:

The transit method detects exoplanets by observing the dimming of a star's light as a planet passes in front of it, requiring sensitive cameras for brightness - monitoring. It has a limitation as the exoplanet's orbital plane must be nearly edge - on to the observer's line of sight for detection.

Answer:

First part: requires sensitive cameras that can monitor the varying brightness of a star as a planet passes in front of it.
Second part: an exoplanet's orbital plane must be nearly edge - on relative to the line of sight of the observer to be detected.