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.

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

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