Question

1. Prehistory	few written records	archaeological sources are one of the many sources
2. Proto-history	plenty of written records	archaeological sources are the only sources
3. History	no written records	archaeological sources are the main source

Answer 1

1. Prehistory - no written records - archaeological sources are the only sources.

Explanation: Writing was not invented in pre-historical age, hence there are no written records of that era. Archaeological sources, such as coins, ornaments, artefacts, etc., are the only available sources of evidence from prehistory.

2. Proto-history - few written records - archaeological sources are the main source.

Explanation: Very few written records are there from this time of history. Historians are still trying to decipher them. Hence, archaeology becomes the main source of evidence for proto-history. Indus Valley civilisation is an example of this period.

3. History - plenty of written records - archaeological sources are one of the many sources.

Explanation: History is the time period after the invention of writing. Hence, there are lots of written records available and archaeological sources are one of the main sources of evidence.