Which of the following pests commonly affects Tennessee agricultural crops?

The selection of aphids, spider mites, and caterpillars as common pests affecting Tennessee agricultural crops is supported by their prevalence in the region's agriculture.

Aphids are known for their rapid reproduction and ability to affect a wide range of crops, including vegetables and fruits. They feed on plant sap, which can weaken plants and transmit diseases. Spider mites are another significant concern; they thrive in warm conditions and can cause considerable damage to crops by feeding on foliage, leading to stippling and eventually plant decline. Caterpillars include various species that can completely defoliate plants, especially in their larval stage, making them a well-known threat in agricultural settings.

While the other options contain pests that might affect specific environments or ecosystems, they are less prevalent in the context of general crop production in Tennessee. Therefore, the combination of aphids, spider mites, and caterpillars reflects a more accurate picture of the pests encountered in Tennessee's agricultural landscapes.