The correct answer is option 3: Both 1 and 2.

Statement 1 is correct because photosynthesis is indeed a process in which plants convert light energy from the Sun into chemical energy. During photosynthesis, plants use sunlight to synthesize carbohydrates from carbon dioxide and water. This process helps plants produce their own food and oxygen.

Statement 2 is also correct as fermentation or zymology is a metabolic process that converts carbohydrates to alcohols and carbon dioxide. While photosynthesis is the main process of energy production in plants, fermentation is an alternative metabolic pathway that occurs in the absence of oxygen. It is a common process in microorganisms and some plants.

Therefore, both statements accurately describe the functions of plants. They highlight the processes of photosynthesis and fermentation as important in energy production and metabolism in plants.