Can someone please explain a volcanic plug, igneous intrusions, batholith, laccolith?

Igneous Intrusion:


A body of rock formed from magma migrating and solidifying deep in the subsurface is called a pluton or an igneous intrusion.





Batholith:


Huge intrusions, covering areas greater than one hudred square kilometers (40 square miles) are called a batholith. Batholiths typically contain many separate intrusions that form over a relatively long period of time.





Laccolith:


A laccolith is a blister-shaped intrusion.





Volcanic plug:


Volcanic plugs are formed when lava solidifies in the pipe of an extinct volcano. Over time, the volcanic cone made up of less resistant rocks wears away, leaving behind the solidified volcanic plug.