Answer:
10. True
11. how behaviour minimizes competition
12. True
Step-by-step explanation:
10. Trophic cascade can be defined s an ecological term which refers to as being triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain, which often results in dramatic changes in ecosystem structure and nutrient cycling.
11. how behaviour minimizes competition
12. Commensalism is the interaction between populations in which one gains from the interaction and the other is unaffected. for example, an interaction between denitrifier and annamox bacteria