All Hawaiian honeycreeper bird species have similar skeletal and muscle structures. However, each Hawaiian
honeycreeper species has a bill specialized for eating certain
foods. What would a scientist most likely conclude based on
this observation?

D

Explanation:

A group or member of a species would overtime become differentiated from the original species that originate from if they occupy a different niche that has a different and unique environmental conditions. In an attempt to adopt to the condition of the new environment, they would develop specific features. For example, the honeycreepers having a bill that are well adapted to eat certain foods.

Therefore, the most likely conclusion the scientist would make is D.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs