The answer explains formulating hypotheses based on El Niño's effects on bird populations and the role of field biologists in studying natural selection.
Hypothesis: The hypothesis could be related to the impact of El Niño on certain bird populations, similar to the Galápagos finches.
Evidence needed to support (or refute) hypothesis: Evidence required could involve observing changes in bird behavior, survival rates, and physical traits like beak size in response to El Niño conditions.
Field Biologists: Field biologists study organisms in their natural habitats, like the Grants who observed Galápagos finch populations to provide insights into natural selection.
https://brainly.com/question/31579431