Answer:
Oil
Explanation:
Oil is the most common fossil fuel internationally, seeing as it is in the top spot for usefulness.
The industrial revolution damaged our ecosystem
The answer is b) "No known sexual mode of spore formation
Answer:
Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air or molten rock.
Explanation:
I believe the answer is 2: multiple ecosystems in a biome