EVERYDAY SCIENCE

Detailed explanation-1: -Photosynthesis is the process of synthesis of food by plants using carbon dioxide and water in presence of sunlight and chlorophyll. Oxygen (O2) is released during the process as a waste product. Hence, oxygen is not essential for the process of photosynthesis.

Detailed explanation-2: -Oxygen and water are the raw materials for photosynthesis.

Detailed explanation-3: -Carbon dioxide and water are the main raw materials for the process of photosynthesis. Besides, light energy and chlorophyll are also raw materials for photosynthesis. Sunlight is the energy source, which is essential for photosynthesis to take place.

Detailed explanation-4: -As observed, for the survival of life, the process of photosynthesis is crucial and raw materials such as water, carbon dioxide and sunlight are important for the completion of the process of photosynthesis.

Detailed explanation-5: -Detailed Solution. The correct answer is gypsum.