4.Which of the following is an example of biotic factor in an ecosystem?A. RockC. SunlightB. StreamD. Tree5. What do you call the physical location of an ecosystem in which a given species lives?A. HabitatC. Biotic FactorB. Level NicheD. Tropical Level6. Which of the following contributes the biggest impact on the environment?A. PredationC. Human interferenceB. CompetitionD. Migration of organisms7. Which phrase BEST describes ecosystem?A. Individual cellsC. Interactions among cellsB. Individual organisms D. Interactions among organisms8. Which of the following is an abiotic factor that may affect the population of organismsA. ParasitesC. Food availabilityB. PredatorsD. Extreme temperatures9. Which of the following is an example of changes in abiotic factor?A. AirC. WaterB. SoilD Wildfire