If land was cleared 100 years ago for farming and has recently to its natural state, covered with plants and trees, what has taken place

How are extrusive rocks formed? magma gets trapped inside earth and cools to rock. volcanoes apply force to solid rocks and eject them. magma gets forced to earth’s surface and cools to rock. volcanoes trap lava inside earth, where it cools to rock.

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

What is a group of organisms that are closely related and share similar characteristics