Answer:
1.mutualism
2.predation
3.mutualism
4.commensalism
5.paratisim
6.paratism
8.predation
9.a competition
10.mutualism
Explanation:
you didn't give 7th no. so I am also not going to give it...
informal is the first sentence and formal is the second sentence.
The answer is B
I think its D