evidence of sea floor spreading. topographic mapping of mountain ranges. an analysis of soil at the plate boundaries. volcanic activity along coastlines.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The Theory of Plate Tectonics is based on
Possibilities:
- evidence of sea floor spreading.
- topographic mapping of mountain ranges.
- an analysis of soil at the plate boundaries.
- volcanic activity along coastlines.

evidence of sea floor spreading.