Which of the following is known as Sungold Falsecypress?

Sungold Falsecypress refers specifically to the cultivar Chamaecyparis pisifera 'Sungold.' This particular plant is valued for its bright yellow foliage, which adds a vibrant touch to landscapes and gardens, especially when planted in sunny locations. The choice is rooted in the characteristics of Chamaecyparis pisifera, commonly known as Japanese falsecypress, which aligns with the naming.

In contrast, the other options represent different genera or species of conifers. Juniperus horizontalis 'Wiltoni,' known as Wilton creeping juniper, is a low-growing groundcover with a different growth habit and appearance. Thuja occidentalis 'Emerald Green' is a type of arborvitae recognized for its dense, dark green foliage rather than any yellow coloration. Lastly, Sequoiadendron giganteum refers to the giant sequoia tree, which is a massive tree unrelated to falsecypress and does not exhibit the characteristics of the Sungold cultivar. Thus, the specificity of Chamaecyparis pisifera 'Sungold' aligns perfectly with the description of the plant in question.