any sort of ancient fossil would be my quess. also i am on achallenge to see how many friends i can get on brainly so pls friend me
You said which, so there should be choices.
Single seismograph can register the occurrence of an earthquake. Analysis of the waves can yield the distance between the sensor and the epicenter. This describes a circle with the seismograph at the center. ... Adding data from a third station pinpoints the epicenter as the only place where all three circles intersect
