Identify six things that will slow down the rate of photosynthesis in a plant

As we know photosynthesis is a process that the plant do it to make its own food

1 - decrease amount of co2 in atmosphere

2-decrease the temperature of the earth

3 - decrease the amount of light the plant absorb it

4 - decrease amount of water the plant absorb it

5 - decrease amount of nitrates

6 - distribution of an ecosystem