Question

how earthquakes show us the inside of the earth
scienceprimer
multiple - choice question
major transition zones between distinct layers of the earth
are known as
seismic boundaries
seismic cutoffs
seismic discontinuities
seismic thresholds
rewatch

Explanation:

Seismic discontinuities are the major transition zones between distinct layers of the Earth. They are identified by changes in the speed of seismic waves as they pass through different materials in the Earth's layers.

Answer:

seismic discontinuities