The right answer is C.
Classically positive interactions or facilitators between species are divided into two broad categories:
- those where the two partners involved benefit from each other: the mutualisms (symbolized by + / +)
- those where one of the two partners makes a profit or an advantage while the other gets nothing from it without being affected negatively: it is the commensalism symbolized by + / 0.
It may be that bacterial commensalism has an interest in its host (the animal) in the sense that it protects against parasites, or on the contrary, it favors their appearance.
The answer is B. Hope this helps!
Reasoning: Brown Algae and Dinoflagellates are both on the same branch, unlike other answers.
Answer:
if you look the page and textbook up itll give you all the answers
