According to my research on studies conducted by various biologists, I can say that based on the information provided within the question they convert light energy into chemical energy. Chloroplasts are organelles that conduct photosynthesis, which is the process of convert light energy from the sun to the chemical energy of a glucose molecule
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ALS causes the motor neurons to gradually deteriorate, and then die. Motor neurons extend from the brain to the spinal cord to muscles throughout the body.