Find the odd mode of transport (medium of travel): Pick the option that travels on water, unlike the others which are land vehicles.

Introduction / Context:
Transportation classification can be resolved by the medium of motion: land, water, air, or ice/snow. When three vehicles or conveyances are designed for land surfaces and one for water, the waterborne option is the natural outlier.

Given Data / Assumptions:

• Chariot: land vehicle, typically horse-drawn, used on roads/terrain.
• Sledge (sled): land/ice/snow conveyance pulled over the ground or ice, still a surface/land mode.
• Cart: land vehicle, commonly wheel-based and animal-drawn or pushed.
• Raft: flat watercraft designed to float and move on water.

Concept / Approach:
Classify by medium: land-surface vs water-surface motion. Raft alone is inherently waterborne; the others are intended for ground or ice surfaces.

Step-by-Step Solution:

Verification / Alternative check:
Consider required physics: buoyancy for a raft vs friction/traction for land conveyances. These requirements differ fundamentally.

Why Other Options Are Wrong:
They share terrestrial operation, even if sledge is optimized for snow/ice; it is still not a watercraft.

Common Pitfalls:
Do not conflate ice/snow motion with water navigation—sledges slide over solid surfaces, not float.

Final Answer:
Raft