The most common sources of rosin are:
* Pine trees: Several species, like the longleaf pine and slash pine, are major sources of rosin.
* Spruce trees: Especially Norway spruce and white spruce.
* Fir trees: Balsam fir is a significant source.
The resin, which is a sticky substance produced by the tree, is extracted and processed to create rosin.
It's important to note that the specific tree species used for rosin production may vary depending on the region and the intended use of the rosin.