Final answer:
The type of bird that lays distinctive blue eggs is the Robin, an option A) in the given list. Robins typically lay four blue eggs in a nest, which is considered an example of stabilizing selection due to survival implications.
Step-by-step explanation:
The question refers to the type of bird that lays distinctive blue eggs. Among the options provided, A) Robin is the correct answer. Robins are known for laying a clutch of eggs that are traditionally blue in color. These eggs are usually laid in a nest that can be quite elaborate. Robins typically lay four eggs at a time, a number which is thought to be an example of stabilizing selection.
This is due to the fact that larger clutches can result in undernourished chicks, while smaller clutches might not result in any viable offspring at all. The coloration of bird eggs, including the blue of robin's eggs, plays a role in their survival, as it may help to camouflage them from predators depending on the nesting environment.