Short Answer 
The classification of items like nail polish, matches, and lithium batteries is essential for safety during transportation, with lithium batteries being identified as limited quantity items due to their hazardous nature. They pose risks such as overheating and potential fires, leading to stricter regulations based on different transport methods, emphasizing the need for compliance and awareness of specific rules.
Step 1: Understand the Classification of Items
Items like nail polish, matches, and lithium batteries fall into different categories based on their risks. Among these, lithium batteries are classified as a limited quantity item due to their hazardous nature. This classification is vital for ensuring safety during transportation and shipping.
Step 2: Recognize the Risks of Lithium Batteries
The primary concern with lithium batteries is their potential for overheating and igniting, which can lead to serious fires. Therefore, special regulations are established for their handling and shipment, unlike typical consumer items. The risks associated with them necessitate careful scrutiny and compliance with safety regulations when transported.
Step 3: Acknowledge Variations in Regulations Based on Transport Means
Different transportation methods influence the regulations that apply to items. For instance, commercial shipping has stricter guidelines compared to personal transport on passenger aircraft. As such, understanding the specific rules for each item type, including quantity limits, is crucial to ensure safe handling and compliance with legal requirements.