A characteristics that helps an organism to survive and reproduce is the best description of an adaptation.
Option D
Step-by-step explanation:
Adaptation is simply defined as the evolutionary process of the organism when they feel comfortable to their natural place of existence. The process takes place in many generation to generation and it is passed on with genetic inheritance. With its biological phenomena it explains a trait in organisms which helps animal to survive and reproduce. It is also process of changing to different places for the organisms. Adaptation happens through mutation or natural selection.