Which of the following is a possible path for carbon to cycle through an ecosystem? 1. Atmospheric CO2 -> animals -> factories -> fossil fuels -> plants

2. Atmospheric CO2 -> factories -> fossil fuels -> animals -> plants

3. Atmospheric CO2 -> plants -> animals -> fossil fuels -> factories

4. Atmospheric CO2 -> fossil fuels -> factories -> animals -> plants

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he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.