This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
An active fault is a fault that has displayed recent seismic activity, while an inactive fault has not displayed recent seismic activity.

There really is no way to concretely define a fault as "active" or "inactive" (especially because inactive faults can suddenly become active again), but it's more or less safe to say that if a fault hasn't shown tectonic activity for about 5,600 years, it's probably inactive.

See attached file for the list of inactive faults and volcanoes in the Philippines.