They will be instructed to park their cars in a cool dry environment in order to prevent rusting of the vehicle parts.
This is defined as a chemical change in which Iron reacts with Oxygen to form a new substance called Iron oxide.
Iron oxide is usually brownish in color and further corrodes the metal parts. It is also referred to as a Chemical change in chemistry due to new substance being formed.
Read more about Rusting here https://brainly.com/question/153893