What term is used to describe a relationship where two or more organisms need to share resources that are essential for life, such as food, water, mates or territory

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

What is a group of organisms that are closely related and share similar characteristics

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?