eopkg history is the way, it'll show you exactly what operation caused them to be installed so you get a better idea if its safe to remove. eopkg info packagename on the other hand as brent hinted will show you dependencies but you have no context for them. Did they come pre-installed? are required by some other application you have installed?
Example:
eopkg info strawberry
Dependencies : libx11 protobuf libgnutls pulseaudio libstdc++ libcdio libgcc chromaprint gstreamer-1.0-plugins-base libmtp libgpod qt5-base gstreamer-1.0 alsa-lib glibc fftw qt5-x11extras gdk-pixbuf taglib sqlite3 glib2
There is a lot in there that if you remove, you'll cause breakages. Stick to eopkg history for getting contextual dependency information.
I would strongly advise you do not go randomly uninstalling packages or manually deleting files via the file manager. The only things that are somewhat safe to delete are in ~/home/username and even then you can still cause issues depending on what you delete. The package manager would not have created those anyway, the applications do on launch. When in doubt, leave it alone.
