What does "the matter that you start with in a chemical reaction"

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

When using the scientist method, which step comes last?