Primary productivity on land is affected by ______.a. nutrient availabilityb. amount of sunlightc. frozen as iced. in bodies of organisms

Key Concepts: Primary Productivity, Land, Nutrient Availability, Sunlight Explanation: Primary productivity on land refers to the rate at which autotrophic organisms like plants, algae, and some bacteria produce organic matter through photosynthesis. This process is affected by several factors including nutrient availability and the amount of sunlight. Step by Step Solution: Step 1. Identify the factors affecting primary productivity on land Step 2. Understand that primary productivity on land is affected by nutrient availability and the amount of sunlight Step 3. Choose option A and B as they are the correct options Final Answer: a. nutrient availability \nb. amount of sunlight