A 30-year-long study by Grant and colleagues (1981; 1984) determined that during periods of drought, medium finches with medium beaks produced more offspring, while during rainy years birds with smaller beaks had the advantage. This study is an example of which method?

Question

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The study by Grant and colleagues involved observing and recording the natural behavior and characteristics of finches in their natural habitat over a long period. This approach is known as monitoring in the field, where researchers collect data without manipulating the environment or the subjects being studied.

A 30-Year-Long Study by Grant and Colleagues (1981; 1984) Determined