Which of the following best describes a treeless biome?

The tundra is best described as a treeless biome due to its harsh environmental conditions that inhibit tree growth. Characterized by its cold climate, short growing season, and often permafrost, the tundra supports only limited vegetation such as mosses, lichens, and small shrubs. The extreme temperatures and limited sunlight during certain parts of the year prevent the establishment of larger plants like trees. In contrast, rainforests are lush and densely populated with a wide variety of trees and plant life, swamps are wetland areas that can support plenty of forestry, and savannas feature scattered trees amid grasslands. Thus, the tundra's unique conditions make it distinctly a treeless biome.