What characteristic of sand particles allows for air and water to pass through them effectively?

The correct choice is based on the understanding of soil structure and how it influences drainage and aeration. Sand particles are larger in size when compared to other soil types, such as silt or clay. This larger particle size contributes to the formation of bigger pore spaces between the grains. These larger pore sizes facilitate the easy movement of air and water through the soil.

When water enters sandy soil, it can drain rapidly due to these large pores, which helps prevent waterlogging and promotes aeration. This is particularly beneficial for plant roots, as they require both adequate air and moisture for optimal growth. The ability of sandy soil to quickly allow water to move through it is a key reason why it is often used in agricultural practices where good drainage is essential.

In contrast, smaller pore sizes, which are characteristic of clay, tend to retain water and limit air movement, leading to less aeration. Chemical activity and moisture retention relate to other properties of soil but do not specifically pertain to the characteristic that allows effective passage of air and water through sand particles.