Select the most appropriate option to fill in blank number 3.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1, i.e. “epicentre.”
The passage states: '…seismic shaking that propagates outward from the (3) _____.'
In seismology, the epicentre is the point on the Earth’s surface that lies directly above the focus (hypocentre), which is the initial point of rupture. Seismic waves radiate outward from this location ([British Geological Survey (BGS)]).
The other options (“opened,” “middleman,” “paradoxical”) are unrelated to this context.