Question: The empty spaces in a material are called pores. Porosity is the amount of empty space within a material. Permeability describes how well the pores in a material are connected. Which of these materials would make the most effective aquifer?

  Options: 
 A. a material that has high porosity and high permeability
 B. a material that has high porosity and low permeability
 C. a material that has low porosity and high permeability
 D. a material that has low porosity and low permeability
Answer: A