If CO2 was in very small amounts then it would be the limiting factor of photosynthesis, this means the process will take place at a much slower rate because it is lacking one of the raw materials it needs for the process to occur. To find the optimum light intensity you really need all other factors to be at optimum levels or in abundance.
Answer:
Amphibians
Explanation:
They had just shown up during the Carboniferous period and were still living in the water.
Fungi eat the dead plants aka nutrients to stay alive
Answer: the right answer is B
