Question

elastic deformation

plastic deformation

fault

seismic wave

primary wave

secondary wave

focus

epicenter

Explanation:

The terms like elastic deformation, plastic deformation, fault, seismic wave, primary wave, secondary wave, focus, and epicenter are related to the study of earthquakes and the structure of the Earth, which falls under the subfield of Geography (a part of Natural Science) as it involves the physical features and processes of the Earth.

Answer:

The subfield that best applies is Geography (under Natural Science).