Comparative and experimental investigations are two of three scientific investigations, the other is descriptive investigations.
--hope this helps--
The location and types of volcanoes are related to plate tectonics as well, so in that sense volcanoes also help us to understand about the tectonic history of a region because if there are volcanoes someplace even if they're not currently active we know that that must have been some sort of a plate uwu
Embryonic stem cells,
Tissue-specific stem cells.
