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PIB 1-3

Horizontales
a community (group) of living things together with their surroundings (the things around them)
animals that are hunted or killed for food
an event that causes a big change in an ecosystem; examples are hurricanes and tornadoes
occurs naturally in a particular place or ecosystem
when an ecosystem returns to normal after an ecological disturbance such as a forest fire
Verticales
organisms (living things) that are brought to a new environment and cause damage (harm) to it
a relationship between two organisms that benefits (helps) both organisms
a group of organisms that are similar (the same) in important ways and can reproduce (have offspring) together
a living thing, such as a plant or animal
an animal that hunts and eats other animals for food