Which of the following processes cycles matter through different parts of an ecosystem

What is the difference between an igneous, sedimentary and metamorphic rock

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

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources