Answer:
Step-by-step explanation:
First of all I am going to answer the question about photosynthesis, number 19 about this question. Photosynthesis is called "synthesis using light" because in this process it basically uses light, carbon dioxide and water. Of course, in this process there is glucose, oxygen and nitrogen, but the three fundamental elements that are in the wording of this question are: water, sunlight and carbon dioxide.The photosynthesis process occurs in chloroplast-rich tissues, one of the most active tissues being the chlorophyll parenchyma found in the leaves.
Talking about the question 20, abiotic factor are lifeless factors, hence the name "lifeless". Therefore, in this matter, the only abiotic factor described is rainfall, which would be a factor in nature and not caused by any living beings or plants. So, the correct answer is Rainfall.