What I learned...
Ecology is the study of relationships between organisms and their environment
Biodiversity is needed for a stable ecosystem
Plants produce their own food through photosynthesis
If one animal goes extinct in an ecosystem is could completely imbalance the entire ecosystem
Phytoplankton creates oxygen in the ocean
Video
Ecology - Rules for Living on Earth: Crash Course Biology #40
(Video by Crash Course)
(Image from LibreTexts)
(Image from Wikipedia)
(Image from ESchoolToday)