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10. True

11. how behaviour minimizes competition

12. True

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

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .