During a total solar eclipse the rate of Photosynthesis?

During a total solar eclipse, sunlight is blocked from reaching the Earth for a short time. Since photosynthesis needs sunlight to take place, the process slows down when there is no light. As a result, the rate of photosynthesis decreases during a total solar eclipse. It does not stop completely if the eclipse is short, but it clearly reduces because light is a key factor in photosynthesis. So, the correct answer is decrease.