Which of the following soil textures has the highest porosity? 

Sandy soil has the highest porosity among the given options.

Porosity refers to the amount of pore space in soil, which affects its ability to hold and transmit water, air, and nutrients. Sandy soil is characterized by larger soil particles with larger pore spaces, which means it has a higher porosity compared to clay, silt, or loam soils.

Clay soil has the lowest porosity among the given options, as it is composed of smaller soil particles that are tightly packed, leaving less room for pore spaces. Silt and loam soils have intermediate levels of porosity, depending on their exact composition.