Here so the other guy gets brainiest :)
The most important holdings were Angola and Mozambique
Abolitionists employed each of these techniques. The underground railroad was a system used to help slaves escape. Religion played a critical role in helping people realize the immorality of slavery and armed force was used in certain cases (occasionally resulting in even greater problems or backlash from slave owners).
It's producers to herbivores to carnivores what ever the herbivores eats the producer goes to it and whatever the carnivores eat the herbivores or other carnivores go to it