Blocks, Since water blocks sunlight, photosynthesis can't occur in deep waters, because sunlight is required for photosynthesis.
The medical terms that ends with ae letter combination shows that it is the plural form of the term.
for example bulla is a medical term which is used for blisters which are filled with fluid, when there is more than one bulla we use the word bullae, that is the plural form of the word bulla.
Sebaceous glands produces oil known as sebum that moisturizes our skin and hair.
Answer: Photosynthesis
Explanation: Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2.
