Theory of Transfer states what?

• A. No transfer occurs when objects contact
• B. Whenever two objects come into contact, a usual transfer of material occurs
• C. Only liquids transfer material
• D. Transfer occurs only under pressure

Answer: (B)

The idea being tested is that contact between objects leads to a material exchange. This is the core of Locard’s Exchange Principle: when two surfaces touch, there is a transfer of material between them, leaving traces on both sides. The key point is that transfer can occur with any type of contact, not only under visible or forceful pressure and not limited to liquids. Even brief or everyday touches can deposit or pick up fibers, skin cells, dust, or other trace evidence, which is why investigators look for such materials at a scene or on a person.

So the best choice states that whenever two objects come into contact, a usual transfer of material occurs, capturing the essential idea that contact itself facilitates material exchange. The other statements misstate the conditions for transfer: transfer can happen with non-liquid materials and does not require pressure, and it can occur even with minimal contact.