Answer:
Supplier
Step-by-step explanation:
Supply
Supply has to do with providing goods produced by the manufacturer to the end-user via distributors or retailers. A supplier is a person who supplies goods to the distributors or retailers, for the goods to get to the final consumers.
In this scenario, the Sparex Inc supplies metal bolts which are materials used by Boilex Inc in manufacturing heavy machines. In the case, Sparex Inc is a supplier to Boilex Inc