This document discusses different types of interactions between living things: - Predation occurs when one organism (the predator) hunts and eats another organism (the prey). - Competition happens when organisms require the same limited resources and "fight" over them. It can be between organisms of the same species (intraspecific) or different species (interspecific). - Cooperation is when organisms help one another, improving both of their chances of survival. - Symbiosis describes close interactions between two organisms that can be mutualistic (benefiting both), parasitic (benefiting one at the expense of the other), or commensalistic (benefiting one without affecting the other). Examples of each type of symbiosis