Question: Ama-Lichens yizinto eziphilayo ezisebenzisanayo ezenziwe ngolwelwe oluluhlaza kanye nesikhunta. Yini ehlinzekwa ulwelwe oluluhlaza kusikhunta kulobu budlelwano be-symbiotic?
Options:
i-carbon dioxide
ukudla
ukuvikela 
amanzi
Answer: B