What factors influence a region's photosynthetic productivity ?

Photosynthesis is the process through which living organisms convert environmental carbon dioxide and water into glucose. The glucose is a sugar essential element that fuels life processes.
Region's photosynthetic productivity is influenced by the the availability of nutrients and the amount of solar radiation, or sunlight.
Nutrients as iron, magnesium and sulfur decrease photosynthesis rates., while nitrogen and phosphorus can prevent a plant from metabolizing glucose.

Nutrients and sunlight

Ithink d would be correct