Xylotomy is the preparation of small slivers of wood for examination under a microscope, often using a microtome. It is useful for providing forensic evidence in some criminal cases, where finding a fragment of wood on an individual and matching it to a weapon used in a crime would be helpful. Histology is the study of the microscopic anatomy of cells and tissues of plants and animals. Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features. Anatomy is the branch of biology concerned with the study of the structure of organisms and their parts.
Thus, the correct answer is option D.