Final answer:
The statement 'Plants with the best adaptations are most likely to survive' is the correct answer, as natural selection operates by favoring advantageous traits that result from mutations and genetic variability, which may lead to beneficial adaptations over time.
Step-by-step explanation:
The correct statement is b. Plants with the best adaptations are most likely to survive. Adaptations are traits that allow a plant, animal, or other organism to survive and reproduce in its environment, and they develop over time through the process of natural selection. Natural selection favors individuals with genetic traits that are advantageous in their environment, such as better ways to get food, build homes, and attract mates. The process of mutation generates genetic variation, and those mutations that confer an advantage may lead to adaptations. However, natural selection does not always choose the fittest in a simplistic sense; sometimes less-fit phenotypes may prevail due to various factors, such as genetic drift or changes in environmental conditions.