An island has a population of 10,000 birds and has 80% gray individuals and 20% black individuals. Generation after generation, this ratio and population size remains basically the same. Which statement must be true about this population?

Answer: gray birds are constantly very adaptive compared to the black individual

Explanation: based on the environment these birds are found at, gray birds seems to have favourable features that are making them survive better at a constant rate which may also mean it's a survival of the fittest thing in which gray birds may have developed certain features that make them outweigh the black ones whether through feeding and surviving particular conditions.