Answer: Option D.
Nervous system,brain, nerve tissue, nerve cell.
Explanation:
Life hierarchy shows the arrangement of levels of development in organism from highest to lowest or lowest to highest base on the complexity.
Nervous system is more complex than brain, brain is complex that nerve tissue, nerve tissue is the assemblage of nerves cell.
Answer:
The Adaptationist Fallacy can prove very costly to biologist who are assuming it wrong according to the function in the environment. Let us have an example of the phenotype of wheat diploid breed that produces non-bearded grains variety, but we cannot assume it as a beneficial phenotype without further extensive research. After research, we came to know that there is also a major hexaploid bearded variety, that produces more number of grains. That's how, the Adaptationist Fallacy may prove fatal if we have assumed diploid as a major beneficial phenotype.