Sparex Inc. is a manufacturer of metal bolts that are used by Boilex Inc. to manufacture heavy machineries. In this instance, Sparex acts as a .

Supplier

Explanation:

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

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.