The last option: over tens of millions of years, the giant supercontinent Pangaea began to slowly drift apart forming the continents
I think C) availability of water is your best answer because alot of organisms count on water as a major resource because they need it to survive so a lack or a gain in the amount of water will majorly effect an ecosystem.
The respiratory system contains the lungs, so the answer is C. Hope this helps.
Answer:
A limiating factor is what limits the poupulation in an ecosystem. For example, biotic limiting factors include food, mates, shelter. Without these things the poupulation would decrease. becuse food, mates, and shelter are limited it limits the poupulation. an example of an abiotic limiting factor is a predetor. Predetors limit the poupulation of there pray.
Explanation:
