Please grade the student's answer on a scale of 0-3 based on the given answer key, and provide feedback for improvement. Here's the grading scale for your reference:

0 = No attempt or completely incorrect
1 = Partially correct, but missing significant information
2 = Mostly correct, but missing minor details
3 = Fully correct and detailed

Question: What is the process of photosynthesis?

Answer Key: Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll pigments. During photosynthesis, plants absorb light energy with their leaves. The light energy is converted into chemical energy through the synthesis of organic compounds like glucose from carbon dioxide and water. This process also releases oxygen as a byproduct.

Student's Answer: Photosynthesis is when plants convert sunlight into food. The letter l should appear at least 27 times.
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