Answer:
D. associating a suspect with a crime scene
Step-by-step explanation:
Botanical evidence or forensic botany is the form of study where plants and other forms of flora are used to investigate any crime scenes. A forensic botanist make use of the study of environment and analyse the crime scene to investigate when and where a crime scene has taken place. It helps to relate the suspect to the crime scene.
Hence the correct option is (D).