Yes. Currently we are going through global warming causing it to be cold one minute and hot the next
Answer:
Carbon is a primary component of all known life on Earth, representing approximately 45–50% of all dry biomass.[1] Carbon compounds occur naturally in great abundance on Earth. Complex biological molecules consist of carbon atoms bonded with other elements, especially oxygen and hydrogen and frequently also nitrogen, phosphorus, and sulfur
Multi cellular organisms have larger and more effective therefore have a very long life span instead of a uni cellar organisms
I do believe it is the ecosystem. An ecosystem is a biological community of interacting organisms and their physical environment.(in general use) a complex network or interconnected system.
Carbon atoms are very flexible and are very common in chemical reactions. It can form four different bonds with other elements. It also makes up 18% of the human body. Not only is it found in the human body, but it's found in every organism.
I hope this helps! If it's multiple choice let me know.