Answer:
Supply chain consists of series of activities in which a product or a material is just transfer from the one point to the final point.
while in the value chain, instead of just transfering we add certain values to it.
eg- suppose a supply chain is there
farmers- wholesaler-retailer-consumer
if the apples just passes through d same channels with out any grading sorting then its a supply chain.
while if at each stage,we add some values to the apples like grading, sorting,packaging,cool storing. then this is called value chain.