Answer:
I think It's D
Explanation:
If it's not D then it's B
Answer:
Their own food materials through photosynthesis by using sunlight, water and carbon dioxide. They also require other nutrients for growth and survival such as nitrogen (NOx) and phosphorus (POx).
Explanation:
pretty sure of it
I dont think it is symbiotic, it is parasitic relationship. They get blood supply of human and dont give anything useful to humans