Final answer:
The desert is the biome characterized by little rainfall, having less than 50 cm of precipitation per year and vegetation such as cacti and hardy shrubs. Therefore, the correct option is C.
Step-by-step explanation:
The biome characterized by little rainfall is the desert. Deserts are found in regions where precipitation is less than 50 cm annually and are known for their low moisture levels, sparse vegetation, and extreme temperatures. The vegetation of deserts often includes cacti and hardy shrubs that are adapted to the arid conditions. The desert biome is distinct from other biomes such as temperate broadleaf forests, coniferous forests, temperate grasslands, and tropical rainforests, all of which have higher levels of precipitation and different types of vegetation.