Concept:Adaptation is the ability of an organism to adjust successfully to changes in its habitat.
When this adjustment fails, the organism cannot survive the pressures of its environment.
Explanation:Every habitat contains conditions such as temperature, water supply, food availability, and predators.
Organisms that adapt well are able to tolerate these conditions and continue to survive.
An organism that cannot adapt faces increasing difficulty in finding food, escaping danger, and reproducing.
As environmental changes continue, these organisms weaken and may eventually lose their population.
Over time, this struggle leads to the complete disappearance of the species from the habitat.
Therefore, the direct result of failing to adapt is that the organism becomes extinct.
Answer:C. extinction