The edaphic factors are related to
Soil texture
The correct option is B.
Explanation of the correct option:
Explanation of the incorrect options:
Option A:
Humidity is a climatic factor that affects the transpiration rate.
Option C:
Rainfall is a climatic factor that can affect the type of vegetation in a particular area. For example, epiphytes depend on atmospheric precipitation and have aerial roots to absorb water from the atmosphere.
Option D:
The wind is also a climatic factor that affects the vegetation such as trees with strong roots, irregular branching, and small leaves.
Final answer: The edaphic factors are related to soil texture.