Final answer:
The perianth consists of the sepals and petals of a flower, which are the non-reproductive parts that collectively form the flower's calyx and corolla.
Step-by-step explanation:
The perianth consists of all the non-reproductive parts of a flower, specifically the sepals and petals. The sepals collectively form the calyx, playing a crucial role in protecting the flower bud before it blooms. Inside the whorl of sepals are the petals, which together are called the corolla, often featuring vibrant colors to attract pollinators. Together, the calyx and corolla create the perianth. Therefore, when considering the options provided, the correct answer is that the perianth consists of (c) sepals and petals.