1. It is a longitudinal and compressional wave
  2. It is analogous to sound waves
  3. It travels with faster speed through solids but slowly through liquids
  4. All the above three
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Answer: Option 4

The characteristic(s) of primary seismic wave are that it is a longitudinal and compressional wave, it is analogous to sound waves and it travels with faster speed through solids but slowly through liquids. Primary waves (P- waves) are compressional waves that are longitudinal in nature.

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