The diffusion of water across a selectively permeable membrane is called
a. osmotic pressure.
b. pinocytosis.
c. active transport.
d. osmosis.

a = executive branch; b = judicial branch

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers