Ecology is the scientific study of the relationships between living animals, plants and other organisms and their environment. There are number topics are available, you can choose the best topic for your ecological presentation.There are several topics with in the broad field of ecology that relate to animals, climate, population and microbiology.One road topic of ecology is animal behavior. Ecologists study the behavior of animals including their eating and breeding habits,migration patterns, living conditions, and behavior with in a species group. I think you can choose this topic for you presentation. You can include more things about this subject.You have to choose help from online writing services. It is highly useful for you.