Question

disadvantages of archaeology as a source of history

Answer 1

It is very difficult to find these fragments

Answer 2

Disadvantages of archaeological sources

1) Climate plays a vital role in the destruction on these archaeological finds as humid climate make them either rust or make them difficult to detect and as such, only structures made out of burnt bricks, stones are found

2) Archaeological excavations are very expensive because whole region has to be excavated or dug if useful evidence of the past is available in part of the region.
Hope would be helpful...