Diana observed that the plants in her garden were not growing well due to poor soil conditions. she tested the soil and used the soil triangle shown below to conclude that if sand is added to the soil, it will become balanced with 33% sand, 33% clay, and 33% silt.

The appropriate answer is c. silty clay loam. This is the most likely soil that was present in the garden before sand was added to balance it. This type of soil contains an even mix of silt and clay. This type of soil does not drain well and tends to hold water. This would not be suitable for most garden variety plants. Adding sand to the soil ensures better drainage and removes moisture that would rot roots or create conditions for fungi to develop.