Needles.
Sharing needles or things that you can eject through your skin (ex. drugs)
Infected tattoo needle that wasn't cleaned and disinfected properly
If they have cell walls it will be hard for the material to get in and out of the cell resulting in cell death or damage
Answer:
B
Explanation:
there are complex feeding mechanisms at work to protect the other species in the food web
Answer: Can restore balance to ecosystems.
