Question

which type of soil has the greatest porosity?
sand
silt
clay
loam

Explanation:

Porosity refers to the volume of pore spaces in soil. Clay particles are very small and have a platelike shape, which allows them to pack in a way that creates more pore spaces (both small and some larger inter - particle spaces due to the arrangement) compared to sand (larger particles with more open but less total pore volume relative to clay), silt (intermediate particle size between sand and clay), and loam (a mixture). So clay has the greatest porosity among these soil types.

Answer:

clay (the option with the radio button selected for clay is the correct one, so the answer is the clay option: clay)