Which of the following would represent a plane in the real world

Think of a piece of paper that is enhanced to grow forever. This would fit the definition of a plane. A plane is a flat surface that has no thickness. A plane contains an infinite number of lines and extends without end in the directions of its lines.

Answer (d) may increase or decrease porosity through dissolution or deposition;

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;