Question

there are many climate regions around the world. some of them can vary from mild temperatures to very extreme ones. one of the harshest regions is the tundra. the tundra is an area of land that has no tree growth due to its cold, windy, and dry nature. tundras can be found in the northern parts of the globe, in the arctic, and the tops of mountains. they have a layer of frozen ground called permafrost, which prevents almost anything from growing in the soil. therefore, only a few animals and plants can survive in these conditions. the author organizes this passage by a. showing the effects of very mild and extreme climates. b. comparing the tundras climate to other climate regions. c. giving the different classifications of permafrost. d. defining the term tundra and describing its conditions.

Explanation:

The passage first defines the tundra as a harsh - climate region with no tree growth due to cold, windy, and dry conditions and mentions permafrost. Then it describes where tundras can be found (northern parts of the globe, Arctic, tops of mountains) and the types of plants and animals that can survive there. It focuses on defining and describing the tundra and its conditions.

Answer:

D. defining the term tundra and describing its conditions