Given a list of geographical features, classify each one as either a natural or man-made feature.
River, Street, Beach
- River: Natural feature
- Street: Man-made feature
- Beach: Natural feature
Complete the following task based on the instruction and optional input provided.### Instruction:
Given a list of geographical features, classify each one as either a natural or man-made feature.

### Input:
River, Street, Beach

### Output:
- River: Natural feature
- Street: Man-made feature
- Beach: Natural feature