________ and level of moisture are the two climatic factors that most affect terrestrial biomes.

• A. Soil pH
• B. Temperature
• C. Sunspot activity
• D. Wind speed

Answer: (B)

Verified step by step guidance

1. Understand the question: The problem is asking about the two climatic factors that most significantly influence terrestrial biomes. Terrestrial biomes are large ecological areas on land, characterized by specific climate conditions, flora, and fauna.
2. Review the options provided: The options include 'Soil pH,' 'Temperature,' 'Sunspot activity,' and 'Wind speed.' Consider which of these are climatic factors and directly influence the characteristics of terrestrial biomes.
3. Recall the definition of climatic factors: Climatic factors are environmental variables related to climate, such as temperature, precipitation, humidity, and wind. These factors shape the distribution and characteristics of biomes.
4. Analyze the role of temperature and moisture: Temperature affects the metabolic rates of organisms and the types of vegetation that can thrive in a biome. Moisture (often measured as precipitation) determines water availability, which is crucial for plant growth and ecosystem sustainability.
5. Eliminate incorrect options: 'Soil pH' is not a climatic factor but a soil property. 'Sunspot activity' and 'Wind speed' are not primary determinants of biome distribution. Therefore, the correct answer is 'Temperature' and 'level of moisture.'