Final answer:
Tags must be made of durable materials that can endure environmental conditions without degradation, with permanent magnet materials being an example of such durability.
Step-by-step explanation:
Tags and their means of attachment must be made of materials that will withstand various environmental conditions, ensuring they do not degrade or fail when exposed to them. A permanent magnet material is an example of a material that retains its magnetic behavior for a long time, even when exposed to demagnetizing influences. These materials are designed to resist factors such as heat, moisture, and chemical exposures, which could otherwise demagnetize or damage them. Therefore, for tags requiring magnetic properties, it is important to choose a permanent magnet material that demonstrates strong and lasting magnetic capabilities.