An ecosystem is a community where living things interact with and depend on each other and their environment. There are several types of biological relationships that exist between organisms in an ecosystem, including symbiosis, parasitism, mutualism, competition, predation, and commensalism. For example, ants live in plant stems for shelter and nourish the plant with droppings, while the plant benefits without being harmed.

1. Ecosystem

2. An ecosystem is a community where
living things interact with their environment
and other living things.
Symbiosis – is a type of biological
relationship among living things that live
closely together.

3. Interactions Among Living Things in Tropical
Rainforests

4. Parasitism – a relationship in which an organism,
the parasite, gets its food from another organism,
the host, causing it harm.
Parasite – the organism that gets its food from
another
Host – the source of food

5. Mutualism – is a relationship in which two
organisms help each other to survive.
Ants burrow into plant stems for shelter, and the plants benefit from
nourishment (droppings), cleaning, disbursement, and defense.

6. Competition – a relationship inn which organisms
compete for food and space.

7. Predation – a relationship in which an
organism, the predator, kills and eats
another organism, the prey for food.

8. Commensalism – the relationship between
organisms in which one benefits without
harming the other.