Which of the following is an example of a biotic factor in an ecosystem?

• A. Temperature
• B. A population of oak trees
• C. Soil minerals
• D. Sunlight

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the concept of biotic factors. Biotic factors refer to the living components of an ecosystem, such as plants, animals, fungi, and microorganisms. These factors interact with each other and with abiotic factors (non-living components) to sustain the ecosystem.
2. Step 2: Review the options provided in the question. The options include: Temperature, A population of oak trees, Soil minerals, and Sunlight.
3. Step 3: Identify which options are abiotic factors. Abiotic factors are non-living elements of the ecosystem, such as temperature, soil minerals, and sunlight. These do not fall under the category of biotic factors.
4. Step 4: Recognize that 'A population of oak trees' is a biotic factor. Oak trees are living organisms, and a population of them represents a group of living entities interacting within the ecosystem.
5. Step 5: Conclude that the correct answer is 'A population of oak trees,' as it is the only example of a biotic factor among the options provided.