Organisms that cause disease are carriers. Such as ticks, fleas, lice.
The first one with the boxing crab and anemone is mutualism.
The second one with the dog and flea is parasitism.
Answer:
B
Explanation:
I've had this question before got it right.
I believe it would be C) Cellulose. As this is one of the essential components found in the cell wall of plant cells.