Read the sentences from the sections “Defining Biomes” and “Biome Types.” Which option BEST describes the relationship between the two sentences? - Over time scientists continued to expand and refine the definition of biome and related concepts

in the burgeoning field of ecology, and in 1963, Shelford characterized the following biomes:

tundra, coniferous forest, deciduous forest, grassland and desert.

- Deciduous Forest: Located in eastern North America, western Europe and northeastern Asia, this

biome is marked by broad-leafed trees, such as maple and oak, that lose their leaves seasonally

as the temperatures begin to drop.

Group of answer choices

A: The first sentence lists the major kinds of biomes; the second sentence describes one of these kinds of biomes.

B: The first sentence lists the most important kinds of biomes; the second sentence explains why deciduous forests are an important biome.

C: The first sentence highlights the role of ecology in understanding biomes; the second sentence shows why ecology is so important for understanding forests.

D: The first sentence highlights how the definition of a biome has expanded over time; the second sentence shows how the definition of a deciduous forest has also expanded over time.