1. Predation: This is the interaction between organisms where one organism (the predator) hunts and kills another organism (the prey) for food. For example, a wolf hunting a deer.

2. Competition: This occurs when two or more organisms need the same resources (like food, water, or space) and their needs conflict. For example, two different species of birds competing for the same type of insect to eat.

Let me know if you'd like more examples or want to explore other biotic factors!