Which of the following methods is used to identify pests by examining a sample under magnification?

The method that involves examining a sample under magnification for pest identification is the one that includes checking against a book with pictures and descriptions. This approach allows for a detailed comparison of the physical characteristics of the sample with documented images and descriptions, enhancing the accuracy of identification. Using this method, individuals can meticulously analyze key features like size, shape, and markings that are critical for proper pest classification.

While collecting a sample and inspecting it under natural sunlight can provide some level of visibility, it lacks the precision required for accurate identification. Submitting a sample to a neighbor does not ensure reliable identification as the neighbor may not have the necessary expertise or resources for analysis. Observing pests in their natural habitat might help in understanding their behavior and ecology but does not provide the focused scrutiny that examining under magnification offers. Therefore, using a reference book allows for a systematic identification process based on detailed visual information.