which is one factor that scientists use to classify orders of soil?\nfertility\nclimate\ndryness\nbedrock

Brief Explanations:

Climate is a major factor in soil - formation and classification. Different climates lead to different soil - forming processes and soil characteristics. Fertility is a property of soil affected by multiple factors but not a primary classification factor. Dryness is related to climate and is not a distinct primary factor for soil - order classification. Bedrock affects soil formation at a local level but is not a main factor for classifying soil orders on a large scale.

Answer:

B. climate