what do the discoveries of shells used in jewelry and a huge dredged canal tell us about the indus valley…

what do the discoveries of shells used in jewelry and a huge dredged canal tell us about the indus valley civilization? choose 1 answer: a suggest they had a religious belief system centered around gods of the ocean b suggest they engaged in sea trade with other societies c suggest they built ships to travel the indus river
Answer
Brief Explanations:
Shells used in jewelry could have been sourced from far - off places via sea trade, and a large dredged canal implies infrastructure for water - based trade and transportation, which are signs of sea trade activities. There is no clear indication that these discoveries point to a religious belief system centered around ocean gods or ship - building specifically for river travel.
Answer:
B. suggest they engaged in sea trade with other societies