Which of the following is the main source of information about Indus Valley Civilisation?

Archaelogical Excavations

The correct answer is Option (1) - Archaelogical Excavations

The main source of information about the Indus Valley Civilization is archaeological excavations. Written records from the time are sparse, and there is a lack of deciphered written language from the civilization. Paintings are not a primary source of information for understanding the civilization, although artifacts such as seals and pottery have been found. Therefore, the correct option is Archaeological Excavations.