Question

henry is interested in studying the different techniques perching birds use to build their nests. what type of investigation would best help henry learn more about this topic? a. discover a previously unknown perching bird species b. make observations in nature c. perform a controlled experiment d. build a model of a nest

Explanation:

To study the nest - building techniques of perching birds, direct observation in their natural habitat is most appropriate. Discovering a new species doesn't focus on nest - building techniques. A controlled experiment may not accurately replicate natural conditions. Building a model doesn't help in studying the actual techniques used by birds.

Answer:

B. make observations in nature