Answer :
The two organisms displayed what is known as co-evolution.
Co-evolution
It is the reciprocal changes that take place in organisms of different species based on how they interact with each other.
Since yucca flowers and yucca moth change in response to changes in either one of them, they are said to co-evolve.
Co-evolution is a process that takes place gradually, over a long period of time. Without co-evolving, one of the two interacting organisms suffers and may end up going extinct or find another way to adapt.
More on coevolution can be found here; https://brainly.com/question/1489642