What happens next in this paragraph?

He shows a new product called nova, which is an electrode for cleaning dirty aluminum. He shows two aluminum plates that are joined together for demonstration purposes. he
Select from:
1). uses the adjustable grill to remove the aluminum.;
2). introduces an additional product called 45 volt to stretch his tire mechanism.;
3). takes the nova rod and shows how he can weld the two pieces together.;
4). shows a different color metal and a list of aluminum plate lists.;
3).