Question

what is the relationship between solar radiation and photosynthesis? which is the cause, which is the effect?

Explanation:

Solar radiation is the energy source for photosynthesis. Plants use solar radiation (light energy) to convert carbon dioxide and water into glucose and oxygen through photosynthesis. So solar radiation is the cause and photosynthesis is the effect as it depends on the availability of solar radiation.

Answer:

Solar radiation is the cause and photosynthesis is the effect. Solar radiation provides the energy that drives the photosynthesis process.