How freely water moves into and through soil or rock is called
porosity
permeability
tributary
saturation

The correct answer is - permeability.

The permeability is the substance's ability to allow another substance pass through it, which in this case would be the water through the rocks.

The unit used for the measuring of the permeability is milidarcies, at least most of the time.

The permeability is directly connected to the porosity of a rock. The more porous a rock is, the bigger the permeability, and the less porous a rock is, the lesser the permeability.

Through this process, the water is able to penetrate deep inside the rocks and into the ground. That results in the creation of water reservoirs from which the springs emerge when they are full and the water is able to come to the surface, or reservoirs of groundwater.

hello!

let's go through all of these words' definitions.

u-shaped valley - where the valley curves down like a u shape

corrie - similar to the hole created at the top of a volcano when it erupts, it's almost like a dent in a mountain

pyramidal peak - a mountain where the peak is very sharp, such as the matterhorn.

arete - two valleys separated by a thin mountain range

i'm going to assume you know how to read a topographic map, but in case you don't, feel free to comment.

now, let's figure out which one's which:

a - seems to be a mountain range separating two valleys, with a mountain running from top center to bottom center and two valleys on either side. therefore, i'd consider this an arete.

b - it looks like a dent into the mountain, like what a corrie is.

c - looks to be a valley, with two steeper sides curving up around the bottom of the valley which has a river in it. i would consider this an u-shaped valley.

hope this !