Final answer:
Locard's Exchange Principle implies the transfer of trace evidence such as fibers, hair, and pollen due to contact, but does not directly relate to identifying blood types from blood found at a scene as it does not involve exchange.
Step-by-step explanation:
The question relates to Dr. Edmond Locard's Exchange Principle, which is foundational in the field of forensic science.
According to this principle, contact between two items will result in an exchange.
For example, the principle implies that fibers can be transferred from one person's clothing to another, hair from your pet may be transferred to your clothing, and pollen from plants in your yard may be found on your shoes, as these are all traces that can be exchanged during contact.
However, blood at a crime scene being used to identify blood type does not fit the principle of exchange, since no transfer of material is implied in simply typing blood found at a scene.
Therefore, the correct answer is that 'blood at a crime scene can be used to identify blood type' does not relate to Locard's Exchange Principle.