I believe the correct answer from the choices listed above is the third option. It would be gravel that is the most permeable. It is the most porous and the the size of the pores are large enough to allow substances to seep in. Hope this answers the question. Have a nice day.
Permeability describes how water can easily move through porous soil or bedrock. Gravel is a loose small fragments of rocks that is usually used for laying on the beds of roads, and rail roads. Gravel is grouped into granular gravel, and pebble gravel. Gravel are highly permeable and porous. Gravel can hold a lot of water, and water can flow easily through them.
Economic activities and trade patterns influence a country's level of development. Modern industrial societies, such as France, the US and Japan are said to be developed countries. Countries with lower levels of prosperity and underdeveloped.
