Final answer:
True. An earthquake early warning system uses computers to detect the start of a large earthquake and sends an alert to prepare communities.
Step-by-step explanation:
True. An earthquake early warning system uses computers to detect the start of a large earthquake. The system then calculates the amount of time it will take for strong shaking to reach a specific location and sends an alert to prepare communities. This alert can help communities take necessary precautions such as evacuating buildings, securing heavy objects, and activating emergency response plans.