Find the odd transport term (vehicle vs goods): Pick the option that denotes merchandise (what is carried) rather than a vehicle (what carries it).

Introduction / Context:
Transport terminology divides neatly into carriers (vehicles) and what they carry (goods). A list that mixes these levels enables a clean classification: three items are vehicles; one is the load being transported. Identifying the semantic level mismatch reveals the odd item rapidly.

Given Data / Assumptions:

• Van: vehicle for transporting people or goods.
• Truck: motor vehicle for carrying heavy goods.
• Trolley (spelled “trolley”): wheeled vehicle/platform for carrying loads.
• Cargo: goods/freight transported by vehicle/ship/aircraft; not a vehicle.

Concept / Approach:
Group by role in the transport system. Van, truck, and trolley are means of conveyance; cargo is the commodity being conveyed. The category difference is fundamental and unambiguous.

Step-by-Step Solution:

Verification / Alternative check:
Use sentence frames: “drive/operate a van/truck/trolley” vs “ship/transport cargo.” Different verbs reflect the category difference.

Why Other Options Are Wrong:
They are all conveyances/platforms and share a functional class.

Common Pitfalls:
Ignore spelling variants; the core semantic roles are what matter.

Final Answer:
Cargo