Water fills up spaces under ground because it has no natural shape or size water is infinite so it fills the space of the area it is in such as a bath tub the water fills the shape of it or fills the area of it and then when someone get in it adjusts to the shape of them making the water rise
Tape worm and ringworm and parasite
I believe group of cells working together and or performing the same task can be categorized also as a specialized tissue.
