During periods of less light, many plants lose their leaves. does this mean that photosynthesis stops?

No, because photosynthesis is when plants make food from the sunlight. If that whole process was to stop, then the plant dies. I read that leaves are lost to deal with harsh winter conditions. Plants also lose leaves, to conserve water.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.