Answer:
The beak of a species of hummingbird fits snugly into the curved flower parts of the heliconia.
Step-by-step explanation:
Coevolution is basically the type of evolution where two species influence each other in process of development and co-evolve together.
Here, the unusual curved shape supports the theroy that beak of a species of hummingbird more readily fits the shape, this allows plant to get pollinated and bird to get the nectar.