Answer:
- Analysis of several seismographs
- location of Earth's epicenter
- identification of seismic wave direction.
Explanation:
The earth's interior cannot be studied directly. Direct evidence is given by studying the composition of the rocks. Indirect evidence is provided by seismic waves. Seismic waves have different behavior when they encounter different states of matter. By studying this, the interior of the Earth can be studied. Hence, the correct options are:
- Analysis of several seismographs
- location of Earth's epicenter
- identification of seismic wave direction.